MEDSI2016 - List of Keywords (optics)

Paper	Title	Other Keywords	Page
MOPE01	Stabilization Methods for Force Actuators and Flexure Hinges	ion, ECR, experiment, site	1
	C. Colldelram, J. Nicolás, C. Ruget ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain
	In the framework of the design of an adaptive optics for x-ray mirrors a stabilization system* for force actuators and flexure hinges have been conceived. This corrector allows to deform the mirror surface at nanometre level but for this purpose it requires resolutions better than 0.02, by using ultra-low constant springs, and to preserve the introduced deformation it is needed to be stable at the same level. The corrector needs to be insensitive when dismantling and remounting the mirror. In the other hand in order to support the corrector its structure is attached to the bender frame and the spring force is transmitted through a level arm by means a bearing articulation. This introduces a small friction but it is still preferably to eliminate it. A new method based -k spring-like constant principle is proposed. Based on this technique it is possible to stabilize the force exerted on the mirror below 0,02N for an error range more than 1 mm. In addition applying the principle to a flexure it allows to compensate it in an angular range in within the torque variation tend to be null, below 0,005 Nm, thus becoming a short range, frictionless and zero torque articulation. * Patent Registered
	Poster MOPE01 [1.046 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-MOPE01
About •	paper received ※ 15 September 2016 paper accepted ※ 08 May 2017 issue date ※ 22 June 2017
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPE24	The Precision Adjustment Holder for Montel Mirrors	ion, focusing, alignment, photon	57
	B.Y. Chen, S.H. Chang, H.Y. Chen, C.Y. Lee, B.H. Lin, M.T. Tang, S.C. Tseng, J.X. Wu, G.C. Yin NSRRC, Hsinchu, Taiwan M. Hong National Taiwan University, Taipei, Taiwan J.R. Kwo NTHU, Hsinchu, Taiwan
	The focusing of X-ray nanoprobe at TPS relay upon the special designed Montel mirrors and its adjustment holder. The holder includes two major parts: (1) fundamental-position alignment part and (2) relative-position adjustment part. The fundamental-position alignment part has the ability to adjust the two mirrors together in 6 DOF., such as X, Y, Z, pitch, roll, and yaw. These translation stages have several-tens mm travel range and nm resolution, while the rotational stages have 40 mrad azimuthal angular range and 0.1~0.01 µrad resolution. The relative-position adjustment part can further adjust the two mirrors to minimize the focal spot. During the pre-alignment process, one of the mirrors can be manual adjusted by micrometer heads in three translation directions with several mm travel range and micro-meters resolution. These micrometer heads also provide this mirror three rotational degree of freedoms with sub-mrad resolution. For the further alignment in vacuum, the additional four piezo-motor actuators can precisely adjust the other Montel mirror in the Y and Z direction with several nm resolution, and its pitch and roll with 1 urad and 0.05 urad resolution, respectively.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-MOPE24
About •	paper received ※ 14 September 2016 paper accepted ※ 19 September 2016 issue date ※ 22 June 2017
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUAA02	Earth, Wind, and Fire: The New Fast Scanning Velociprobe	ion, controls, GUI, coupling	112
	C.A. Preissner, J. Deng, C. Jacobsen, B. Lai, F.S. Marin, J. Maser, S.T. Mashrafi, C. Roehrig, S. Sullivan, S. Vogt ANL, Argonne, Illinois, USA
	Funding: Argonne is managed by UChicago Argonne, LLC, for the U.S. Department of Energy under contract DE-AC02-06CH11357. The Advanced Photon Source Upgrade (APS-U) project will include a suite of new beam-lines. In preparation for this, a team at the APS is developing an X-ray microscope with a novel granite (Earth), air bearing (Wind) supported stage to take advantage of the two orders of magnitude increased coherent flux (Fire) that will be available with the APS-U. The instrument will be able to operate as a scanning probe for fluorescence microscopy and as a ptychoprobe for the ultimate in spatial resolution. Both are combined with tomography. The goals for the instrument while operating at the current APS are to demonstrate fast scanning of large samples at high resolution and ptychography at the highest resolution (speed and resolution limited by available flux). This presentation will discuss the unique mechanics, interferometry scheme, the advanced scanning control, and instrument integration.
	Slides TUAA02 [25.518 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUAA02
About •	paper received ※ 10 September 2016 paper accepted ※ 20 September 2016 issue date ※ 22 June 2017
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUBA03	The Generic Mirror Chamber for the European XFEL	ion, FEL, alignment, software	121
	T. Noll BESSY GmbH, Berlin, Germany H. Sinn, A. Trapp XFEL. EU, Hamburg, Germany
	For the high demanding requirements of the beam-lines of the European XFEL [] new mirror chambers were developed, designed and tested. A prototype contains the main features of all needed ten units which are tested extensively. The concept of the mirror chamber is a further development of our Cartesian parallel kinematics for X-ray optics in the UHV []. The stiffness and vibration behaviour were further improved and the position resolution was increased compared to earlier implementations at Bessy and Flash. For that the drives were redesigned and now feature a stroke of 100 mm with nanometer resolution. H. Sinn, TDR: X-Ray Optics and Beam Transport, December 2012, XFEL. EU TR-2012-006 doi:10.3204 ** T. Noll, Parallel kinematics for nanoscale Car-tesian motions, Precision Engineering Vol.33/3 Pg.291
	Slides TUBA03 [38.484 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUBA03
About •	paper received ※ 09 September 2016 paper accepted ※ 15 September 2016 issue date ※ 22 June 2017
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPE01	DMM Thermal Mechanical Design	ion, detector, operation, experiment	152
	J.H. Kelly DLS, Oxfordshire, United Kingdom
	A Double Multilayer Monochromator (DMM) was designed in-house for the VMXi beamline. Thermal mechanical finite element analysis was performed to design a novel optic geometry, employing In/Ga eutectic cooling. The integration of a DMM into the existing beamline required additional power management components, such as a low energy power filter, a power detector and compact CuCrZr masks. This paper describes the thermal management challenges and their solutions. The DMM has been fully commissioned and is operational within the original I02 beamline.
	Poster TUPE01 [6.566 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE01
About •	paper received ※ 08 September 2016 paper accepted ※ 20 September 2016 issue date ※ 22 June 2017
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPE16	Design of A Leaf Spring Bender for Double Laue Crystal Monochromator at SSRF	ion, SRF, synchrotron, focusing	198
	H.L. Qin, K. Yang SSRF, Shanghai, People’s Republic of China L. Jin, H. Zhang, W. Zhu SINAP, Shanghai, People’s Republic of China
	A leaf spring bender geometry for water-cooled double Laue crystal monochromator (DLM) is presented. The DLM will be employed to acquire high energy mono-chromatic X-ray (60keV to 120keV) on the ultra-hard applications beamline at SSRF. A compact bending mechanism is designed in order to get horizontally fo-cused high energy monochromatic X-ray as small as 0.5mm. The bender applies a piece of thin asymmetric crystal and a pair of leaf springs which push the crystal to a sagittally bent radius as small as 1 meter by a pair of symmetry moments. An optimized crystal geometry is achieved by taking into account the meridional and sagit-tal bendings coupled and defined by the anisotropic elas-ticity of the asymmetric crystal. Furthermore, thermal slope error and structural stress of the bent crystal are analyzed by finite element method (FEA).
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE16
About •	paper received ※ 09 September 2016 paper accepted ※ 22 September 2016 issue date ※ 22 June 2017
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPE22	Low-Order Aberrations Correction of Extreme Ultraviolet Imaging Objective with Deformable Multilayer Mirrors	ion, alignment, controls, software	213
	M. Toyoda, R. Sunayama, M. Yanagihara Tohoku University, Institute of Multidisciplinary Research for Advanced Materials, Sendai, Japan
	For at-wavelength observation of a lithography mask, recently, we proposed an EUV microscope consisting of multilayer-mirror objective (operating wavelength: 13.5 nm, numerical aperture: 0.25). To provide diffraction-limited spatial resolution below 30 nm, reduction of wave aberrations of low order, i.e., spherical aberration, coma, and astigmatism, should be key technical challenge for the microscope. In this paper, firstly, we describe detail of optical design and instrumentation of the point diffraction interferometer (PDI), so as to provide high enough sensing accuracy of 100 pm, which would be required for an optical axis adjustment of the EUV objective. Next, experimental results of wave front correction on the EUV objective are reported. We corrected spherical aberration and coma by precisely aligning an optical axis of the mirrors, while effects of astigmatism were also minimized with a figure-deformable mirror which can control radius of curvature in two mutually orthogonal directions. We confirmed that these low order terms should be less than 0.3 nm RMS.
	Poster TUPE22 [3.217 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE22
About •	paper received ※ 06 September 2016 paper accepted ※ 22 September 2016 issue date ※ 22 June 2017
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPE14	Minimizing Grating Slope Errors in the IEX Monochromator at the Advanced Photon Source	ion, photon, experiment, ISOL	336
	M.V. Fisher, L. Assoufid, J.L. McChesney, J. Qian, R. Reininger, F.M. Rodolakis ANL, Argonne, Illinois, USA
	Funding: Work supported by the U.S. Department of Energy, Office of Science, under contract number DE-AC02-06CH11357. The IEX beamline at the APS is currently in the commissioning phase. The energy resolution of the beamline was not meeting original specifications by several orders of magnitude. The monochromator, an in-focus VLS-PGM, is currently configured with a high and a medium-line-density grating. Experimental results indicated that both gratings were contributing to the poor energy resolution and this led to venting the monochromator to investigate. The initial suspicion was that a systematic error had occurred in the ruling process on the VLS gratings, but that proved to not be the case. Instead the problem was isolated to mechanical constraints used to mount the gratings into their respective side-cooled holders. Modifications were made to the holders to eliminate problematic constraints without compromising the rest of the design. Metrology performed on the gratings in the original and modified holders demonstrated a 20-fold improvement in the surface profile error which was consistent with finite element analysis performed in support of the modifications. Two gratings were successfully reinstalled and subsequent measurements with beam show a dramatic improvement in energy resolution.
	Poster WEPE14 [2.115 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-WEPE14
About •	paper received ※ 10 September 2016 paper accepted ※ 16 September 2016 issue date ※ 22 June 2017
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPE26	Upgrade the Beamline PF-AR NW14A for the High-Repetition-Rate X-Ray Pump-Probe Experiments	ion, laser, experiment, focusing	351
	S. Nozawa KEK, Ibaraki, Japan
	We report the upgrade of the x-ray pump probe system to high repetition rate at the beamline PF-AR NW14A. A 400 fs high-repetition rate fiber laser system (Amplitude, Tangerine) was newly installed. The fiber laser system, which is operated at 1030 nm fundamental wavelength, is capable of reaching up to 0.1 mJ pulse with a repetition rate of 400 kHz. A higher harmonic generation system enlarges the spectral range from UV to mid-infrared. To increase the laser power density at a sample position, the x-ray was additionally focused by a polycapillary lens (Polycapillary Optics, XOS). The synchronization of X-ray and laser pulses is based on the RF master clock of the storage ring. The delay between the laser and the X-ray is controlled by changing the emission timing of the laser with a Trigger & Clock Delay Module (84DgR5CO1, CANDOX). The high repetition rate system increases experimental efficiency 400 times.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-WEPE26
About •	paper received ※ 11 September 2016 paper accepted ※ 23 September 2016 issue date ※ 22 June 2017
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FRAA01	Engineering Challenges on the I14 Nanoprobe Beamline	ion, vacuum, detector, cryogenics	398
	A. Peach, F. Cacho-Nerin, J. Parker, P.D. Quinn DLS, Oxfordshire, United Kingdom
	An overview of the double branch 185m I14 Nano-probe beam-line under construction at DLS will be presented together with the end-station design in further detail. The end station consists of a split vacuum vessel containing a KB mirror configuration (at UHV) and the sample environment (at HV) which is just 50mm from the end of the final KB optic. An in-vacuum detector is mounted between the KB and the sample whilst two externally mounted detectors will operate between 0.25m & 3m from the sample. Four cryogenic samples can be brought into the vessel at a time and transferred remotely to the sample position with cooling provided by a Helium pulse tube cooler. With an initial 50nm size beam, stability is absolutely critical and careful attention has been paid in the design to mitigate any thermal and structural sources of vibration. An array of interferometers reference the KB mirrors and sample position and will be used to actively correct for any drifts. The very tight space constraints involved have greatly increased the complexity and duration of the design but testing of prototypes is now underway. The system is scheduled for build and test through the Autumn 2016.
	Slides FRAA01 [15.581 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-FRAA01
About •	paper received ※ 09 September 2016 paper accepted ※ 23 September 2016 issue date ※ 22 June 2017
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FRBA02	The Nanobender: A New X-Ray Mirror Bender With Nanometer Figure Correction	ion, focusing, controls, vacuum	413
	C. Colldelram, J. Nicolás, P. Pedreira, L. Ribó, C. Ruget, I. Sics ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain J.M. Casalta Escuer, C. Martín-Nuño Gonzalez, A. Tomas Justribo, D. Úbeda Gonzalez SENER, Cerdanyola del Vallès, Spain
	Over time X-Ray mirrors are demanded for better focusing, closer to sample refocusing, spot size as well as better beam uniformity at sample position. Based on the experience of ALBA Phase I beam lines a new alter-native design of a mirror bender* is proposed. The system includes two main functionalities: the mirror bender mechanism and mirror figure error correc-tion. Both mechanisms are based on the introduction of a force constrain on the mirror surface instead of a geometrical one. As being based on a force mechanism they could reach high resolution and especially for the correctors which can achieve nanometre resolution. The correctors are designed to provide high force stability in the mirror side, eliminating the crosstalk between bending and figure correction, and minimizing the sensitivity to drifts. With such controlled deformation of the mirror substrate it is possible to obtain the desired surface figure not only to correct mirror figure errors but also to adapt it to the incident wavefront, thus becoming adaptive system. The mechanical solutions are presented which are able to correct mirror surfaces with a resolution of 1 nm reaching slope errors below 100 nrad. * Patent Registered
	Slides FRBA02 [4.766 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-FRBA02
About •	paper received ※ 03 October 2016 paper accepted ※ 08 May 2017 issue date ※ 22 June 2017
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FRBA03	Design of the Diamond Light Source DMM for the VMXi Beamline	ion, vacuum, GUI, radiation	420
	D.J. Butler, J.H. Kelly DLS, Oxfordshire, United Kingdom
	A Double Multilayer Monochromator (DMM) was designed in-house for the VMXi beam-line. This paper describes the novel engineering solutions employed to build a high stability instrument. PiezoMotor® actuators drive sine-arm Bragg axes for both optics providing the coarse and fine motion in a single actuator. The long translation of the second multilayer is driven externally via a linear shift to eliminate in-vacuum pipe & cable motions. A high stability air bearing translates the whole DMM across the two multilayer stripes. The optics are water cooled via an Indium / Gallium eutectic alloy bath to minimise coupled vibrations. The DMM is operational on the VMXi beam-line, experimental and performance data is presented.
	Slides FRBA03 [8.899 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-FRBA03
About •	paper received ※ 09 September 2016 paper accepted ※ 19 September 2016 issue date ※ 22 June 2017
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Other Keywords

Page

MOPE01

Stabilization Methods for Force Actuators and Flexure Hinges

ion, ECR, experiment, site

1

C. Colldelram, J. Nicolás, C. Ruget
ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain

In the framework of the design of an adaptive optics for x-ray mirrors a stabilization system* for force actuators and flexure hinges have been conceived. This corrector allows to deform the mirror surface at nanometre level but for this purpose it requires resolutions better than 0.02, by using ultra-low constant springs, and to preserve the introduced deformation it is needed to be stable at the same level. The corrector needs to be insensitive when dismantling and remounting the mirror. In the other hand in order to support the corrector its structure is attached to the bender frame and the spring force is transmitted through a level arm by means a bearing articulation. This introduces a small friction but it is still preferably to eliminate it. A new method based -k spring-like constant principle is proposed. Based on this technique it is possible to stabilize the force exerted on the mirror below 0,02N for an error range more than 1 mm. In addition applying the principle to a flexure it allows to compensate it in an angular range in within the torque variation tend to be null, below 0,005 Nm, thus becoming a short range, frictionless and zero torque articulation.
* Patent Registered

Poster MOPE01 [1.046 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-MOPE01

About •

paper received ※ 15 September 2016 paper accepted ※ 08 May 2017 issue date ※ 22 June 2017

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPE24

The Precision Adjustment Holder for Montel Mirrors

ion, focusing, alignment, photon

57

B.Y. Chen, S.H. Chang, H.Y. Chen, C.Y. Lee, B.H. Lin, M.T. Tang, S.C. Tseng, J.X. Wu, G.C. Yin
NSRRC, Hsinchu, Taiwan
M. Hong
National Taiwan University, Taipei, Taiwan
J.R. Kwo
NTHU, Hsinchu, Taiwan

The focusing of X-ray nanoprobe at TPS relay upon the special designed Montel mirrors and its adjustment holder. The holder includes two major parts: (1) fundamental-position alignment part and (2) relative-position adjustment part. The fundamental-position alignment part has the ability to adjust the two mirrors together in 6 DOF., such as X, Y, Z, pitch, roll, and yaw. These translation stages have several-tens mm travel range and nm resolution, while the rotational stages have 40 mrad azimuthal angular range and 0.1~0.01 µrad resolution. The relative-position adjustment part can further adjust the two mirrors to minimize the focal spot. During the pre-alignment process, one of the mirrors can be manual adjusted by micrometer heads in three translation directions with several mm travel range and micro-meters resolution. These micrometer heads also provide this mirror three rotational degree of freedoms with sub-mrad resolution. For the further alignment in vacuum, the additional four piezo-motor actuators can precisely adjust the other Montel mirror in the Y and Z direction with several nm resolution, and its pitch and roll with 1 urad and 0.05 urad resolution, respectively.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-MOPE24

About •

paper received ※ 14 September 2016 paper accepted ※ 19 September 2016 issue date ※ 22 June 2017

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUAA02

Earth, Wind, and Fire: The New Fast Scanning Velociprobe

ion, controls, GUI, coupling

112

C.A. Preissner, J. Deng, C. Jacobsen, B. Lai, F.S. Marin, J. Maser, S.T. Mashrafi, C. Roehrig, S. Sullivan, S. Vogt
ANL, Argonne, Illinois, USA

Funding: Argonne is managed by UChicago Argonne, LLC, for the U.S. Department of Energy under contract DE-AC02-06CH11357.
The Advanced Photon Source Upgrade (APS-U) project will include a suite of new beam-lines. In preparation for this, a team at the APS is developing an X-ray microscope with a novel granite (Earth), air bearing (Wind) supported stage to take advantage of the two orders of magnitude increased coherent flux (Fire) that will be available with the APS-U. The instrument will be able to operate as a scanning probe for fluorescence microscopy and as a ptychoprobe for the ultimate in spatial resolution. Both are combined with tomography. The goals for the instrument while operating at the current APS are to demonstrate fast scanning of large samples at high resolution and ptychography at the highest resolution (speed and resolution limited by available flux). This presentation will discuss the unique mechanics, interferometry scheme, the advanced scanning control, and instrument integration.

Slides TUAA02 [25.518 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUAA02

About •

paper received ※ 10 September 2016 paper accepted ※ 20 September 2016 issue date ※ 22 June 2017

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUBA03

The Generic Mirror Chamber for the European XFEL

ion, FEL, alignment, software

121

T. Noll
BESSY GmbH, Berlin, Germany
H. Sinn, A. Trapp
XFEL. EU, Hamburg, Germany

For the high demanding requirements of the beam-lines of the European XFEL [*] new mirror chambers were developed, designed and tested. A prototype contains the main features of all needed ten units which are tested extensively. The concept of the mirror chamber is a further development of our Cartesian parallel kinematics for X-ray optics in the UHV [**]. The stiffness and vibration behaviour were further improved and the position resolution was increased compared to earlier implementations at Bessy and Flash. For that the drives were redesigned and now feature a stroke of 100 mm with nanometer resolution.
* H. Sinn, TDR: X-Ray Optics and Beam Transport, December 2012, XFEL. EU TR-2012-006 doi:10.3204
** T. Noll, Parallel kinematics for nanoscale Car-tesian motions, Precision Engineering Vol.33/3 Pg.291

Slides TUBA03 [38.484 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUBA03

About •

paper received ※ 09 September 2016 paper accepted ※ 15 September 2016 issue date ※ 22 June 2017

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPE01

DMM Thermal Mechanical Design

ion, detector, operation, experiment

152

J.H. Kelly
DLS, Oxfordshire, United Kingdom

A Double Multilayer Monochromator (DMM) was designed in-house for the VMXi beamline. Thermal mechanical finite element analysis was performed to design a novel optic geometry, employing In/Ga eutectic cooling. The integration of a DMM into the existing beamline required additional power management components, such as a low energy power filter, a power detector and compact CuCrZr masks. This paper describes the thermal management challenges and their solutions. The DMM has been fully commissioned and is operational within the original I02 beamline.

Poster TUPE01 [6.566 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE01

About •

paper received ※ 08 September 2016 paper accepted ※ 20 September 2016 issue date ※ 22 June 2017

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPE16

Design of A Leaf Spring Bender for Double Laue Crystal Monochromator at SSRF

ion, SRF, synchrotron, focusing

198

H.L. Qin, K. Yang
SSRF, Shanghai, People’s Republic of China
L. Jin, H. Zhang, W. Zhu
SINAP, Shanghai, People’s Republic of China

A leaf spring bender geometry for water-cooled double Laue crystal monochromator (DLM) is presented. The DLM will be employed to acquire high energy mono-chromatic X-ray (60keV to 120keV) on the ultra-hard applications beamline at SSRF. A compact bending mechanism is designed in order to get horizontally fo-cused high energy monochromatic X-ray as small as 0.5mm. The bender applies a piece of thin asymmetric crystal and a pair of leaf springs which push the crystal to a sagittally bent radius as small as 1 meter by a pair of symmetry moments. An optimized crystal geometry is achieved by taking into account the meridional and sagit-tal bendings coupled and defined by the anisotropic elas-ticity of the asymmetric crystal. Furthermore, thermal slope error and structural stress of the bent crystal are analyzed by finite element method (FEA).

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE16

About •

paper received ※ 09 September 2016 paper accepted ※ 22 September 2016 issue date ※ 22 June 2017

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPE22

Low-Order Aberrations Correction of Extreme Ultraviolet Imaging Objective with Deformable Multilayer Mirrors

ion, alignment, controls, software

213

M. Toyoda, R. Sunayama, M. Yanagihara
Tohoku University, Institute of Multidisciplinary Research for Advanced Materials, Sendai, Japan

For at-wavelength observation of a lithography mask, recently, we proposed an EUV microscope consisting of multilayer-mirror objective (operating wavelength: 13.5 nm, numerical aperture: 0.25). To provide diffraction-limited spatial resolution below 30 nm, reduction of wave aberrations of low order, i.e., spherical aberration, coma, and astigmatism, should be key technical challenge for the microscope. In this paper, firstly, we describe detail of optical design and instrumentation of the point diffraction interferometer (PDI), so as to provide high enough sensing accuracy of 100 pm, which would be required for an optical axis adjustment of the EUV objective. Next, experimental results of wave front correction on the EUV objective are reported. We corrected spherical aberration and coma by precisely aligning an optical axis of the mirrors, while effects of astigmatism were also minimized with a figure-deformable mirror which can control radius of curvature in two mutually orthogonal directions. We confirmed that these low order terms should be less than 0.3 nm RMS.

Poster TUPE22 [3.217 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE22

About •

paper received ※ 06 September 2016 paper accepted ※ 22 September 2016 issue date ※ 22 June 2017

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPE14

Minimizing Grating Slope Errors in the IEX Monochromator at the Advanced Photon Source

ion, photon, experiment, ISOL

336

M.V. Fisher, L. Assoufid, J.L. McChesney, J. Qian, R. Reininger, F.M. Rodolakis
ANL, Argonne, Illinois, USA

Funding: Work supported by the U.S. Department of Energy, Office of Science, under contract number DE-AC02-06CH11357.
The IEX beamline at the APS is currently in the commissioning phase. The energy resolution of the beamline was not meeting original specifications by several orders of magnitude. The monochromator, an in-focus VLS-PGM, is currently configured with a high and a medium-line-density grating. Experimental results indicated that both gratings were contributing to the poor energy resolution and this led to venting the monochromator to investigate. The initial suspicion was that a systematic error had occurred in the ruling process on the VLS gratings, but that proved to not be the case. Instead the problem was isolated to mechanical constraints used to mount the gratings into their respective side-cooled holders. Modifications were made to the holders to eliminate problematic constraints without compromising the rest of the design. Metrology performed on the gratings in the original and modified holders demonstrated a 20-fold improvement in the surface profile error which was consistent with finite element analysis performed in support of the modifications. Two gratings were successfully reinstalled and subsequent measurements with beam show a dramatic improvement in energy resolution.

Poster WEPE14 [2.115 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-WEPE14

About •

paper received ※ 10 September 2016 paper accepted ※ 16 September 2016 issue date ※ 22 June 2017

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WEPE26

Upgrade the Beamline PF-AR NW14A for the High-Repetition-Rate X-Ray Pump-Probe Experiments

ion, laser, experiment, focusing

351

S. Nozawa
KEK, Ibaraki, Japan

We report the upgrade of the x-ray pump probe system to high repetition rate at the beamline PF-AR NW14A. A 400 fs high-repetition rate fiber laser system (Amplitude, Tangerine) was newly installed. The fiber laser system, which is operated at 1030 nm fundamental wavelength, is capable of reaching up to 0.1 mJ pulse with a repetition rate of 400 kHz. A higher harmonic generation system enlarges the spectral range from UV to mid-infrared. To increase the laser power density at a sample position, the x-ray was additionally focused by a polycapillary lens (Polycapillary Optics, XOS). The synchronization of X-ray and laser pulses is based on the RF master clock of the storage ring. The delay between the laser and the X-ray is controlled by changing the emission timing of the laser with a Trigger & Clock Delay Module (84DgR5CO1, CANDOX). The high repetition rate system increases experimental efficiency 400 times.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-WEPE26

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paper received ※ 11 September 2016 paper accepted ※ 23 September 2016 issue date ※ 22 June 2017

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FRAA01

Engineering Challenges on the I14 Nanoprobe Beamline

ion, vacuum, detector, cryogenics

398

A. Peach, F. Cacho-Nerin, J. Parker, P.D. Quinn
DLS, Oxfordshire, United Kingdom

An overview of the double branch 185m I14 Nano-probe beam-line under construction at DLS will be presented together with the end-station design in further detail. The end station consists of a split vacuum vessel containing a KB mirror configuration (at UHV) and the sample environment (at HV) which is just 50mm from the end of the final KB optic. An in-vacuum detector is mounted between the KB and the sample whilst two externally mounted detectors will operate between 0.25m & 3m from the sample. Four cryogenic samples can be brought into the vessel at a time and transferred remotely to the sample position with cooling provided by a Helium pulse tube cooler. With an initial 50nm size beam, stability is absolutely critical and careful attention has been paid in the design to mitigate any thermal and structural sources of vibration. An array of interferometers reference the KB mirrors and sample position and will be used to actively correct for any drifts. The very tight space constraints involved have greatly increased the complexity and duration of the design but testing of prototypes is now underway. The system is scheduled for build and test through the Autumn 2016.

Slides FRAA01 [15.581 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-FRAA01

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paper received ※ 09 September 2016 paper accepted ※ 23 September 2016 issue date ※ 22 June 2017

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FRBA02

The Nanobender: A New X-Ray Mirror Bender With Nanometer Figure Correction

ion, focusing, controls, vacuum

413

C. Colldelram, J. Nicolás, P. Pedreira, L. Ribó, C. Ruget, I. Sics
ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain
J.M. Casalta Escuer, C. Martín-Nuño Gonzalez, A. Tomas Justribo, D. Úbeda Gonzalez
SENER, Cerdanyola del Vallès, Spain

Over time X-Ray mirrors are demanded for better focusing, closer to sample refocusing, spot size as well as better beam uniformity at sample position. Based on the experience of ALBA Phase I beam lines a new alter-native design of a mirror bender* is proposed. The system includes two main functionalities: the mirror bender mechanism and mirror figure error correc-tion. Both mechanisms are based on the introduction of a force constrain on the mirror surface instead of a geometrical one. As being based on a force mechanism they could reach high resolution and especially for the correctors which can achieve nanometre resolution. The correctors are designed to provide high force stability in the mirror side, eliminating the crosstalk between bending and figure correction, and minimizing the sensitivity to drifts. With such controlled deformation of the mirror substrate it is possible to obtain the desired surface figure not only to correct mirror figure errors but also to adapt it to the incident wavefront, thus becoming adaptive system. The mechanical solutions are presented which are able to correct mirror surfaces with a resolution of 1 nm reaching slope errors below 100 nrad.
* Patent Registered

Slides FRBA02 [4.766 MB]

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reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-FRBA02

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paper received ※ 03 October 2016 paper accepted ※ 08 May 2017 issue date ※ 22 June 2017

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FRBA03

Design of the Diamond Light Source DMM for the VMXi Beamline

ion, vacuum, GUI, radiation

420

D.J. Butler, J.H. Kelly
DLS, Oxfordshire, United Kingdom

A Double Multilayer Monochromator (DMM) was designed in-house for the VMXi beam-line. This paper describes the novel engineering solutions employed to build a high stability instrument. PiezoMotor® actuators drive sine-arm Bragg axes for both optics providing the coarse and fine motion in a single actuator. The long translation of the second multilayer is driven externally via a linear shift to eliminate in-vacuum pipe & cable motions. A high stability air bearing translates the whole DMM across the two multilayer stripes. The optics are water cooled via an Indium / Gallium eutectic alloy bath to minimise coupled vibrations. The DMM is operational on the VMXi beam-line, experimental and performance data is presented.

Slides FRBA03 [8.899 MB]

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reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-FRBA03

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paper received ※ 09 September 2016 paper accepted ※ 19 September 2016 issue date ※ 22 June 2017

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