DIPAC2011 - List of Authors (Haseitl, R.)

Paper

Title

Page

Scintillation Screen Investigations for High Energy Heavy Ion Beams at GSI

170

P. Forck, C.A. Andre, F. Becker, R. Haseitl, A. Reiter, B. Walasek-Höhne
GSI, Darmstadt, Germany
W. Ensinger, K. Renuka
TU Darmstadt, Darmstadt, Germany

Funding: Funded by the German Ministry of Science (BMBF) under contract No. 06DA9026
Various scintillation screens were irradiated with high energy ion beams as extracted from the GSI synchrotron SIS18. Their imaging properties were studied with the goal to achieve a precise transverse profile determination. Scintillation images were characterized with respect to the light yield and statistical moments of the light distribution i.e. imaged beam width and shape. To study the scintillation properties over a wide range of intensities a 300 MeV/u Uranium ion beam with 10⁴ to 10⁹ particles per pulse was applied. Sensitive scintillators, namely CsI:Tl, YAG:Ce, P43 and Ce-doped glass were investigated for lower beam currents. Ceramics like Al₂O₃, Al₂O₃:Cr, ZrO₂:Y and ZrO₂:Mg as well as Herasil-glass were studied up to the maximum beam currents. For the various screens remarkable differences have been observed, e.g. the recorded profile width varies by nearly a factor of two. The obtained results serve as a basis for an appropriate choice of scintillator materials, which have to cope with the diversity of ion species and intensities at FAIR.

Poster MOPD53 [1.897 MB]

MOPD60

Beam Induced Fluorescence (BIF) Monitors as a Standard Operating Tool

185

C.A. Andre, F. Becker, H. Bräuning, P. Forck, R. Haseitl, R. Lonsing, B. Walasek-Höhne
GSI, Darmstadt, Germany

For high current operation at the GSI Heavy Ion UNILAC non intercepting methods for transverse beam profile determination are required. The Beam Induced Fluorescence (BIF) Monitor, an optical measurement device based on the observation of fluorescent light emitted by excited gas molecules was brought to routine operation. Detailed investigations were conducted for various beam parameters to improve the electronics and the optical setup. Up to now, four BIF monitor stations (for detection of both, horizontal and vertical beam profiles) were installed at UNILAC and two additional setups are planned. This contribution reports on first upgrades of the BIF monitors with a Siemens PLC for FESA-based slow controls and hardware protection procedures. The versatile control and display software ProfileView is presented as an easy-to-use and stable beam diagnostic tool for the GSI operating team.

Poster MOPD60 [3.060 MB]

MOPD86

Development of FESA-based Data Acquisition and Control for FAIR

248

R. Haseitl, H. Bräuning, T. Hoffmann, K. Lang, R. Singh
GSI, Darmstadt, Germany

GSI has selected the CERN Front End Software Architecture (FESA) to operate future beam diagnostic devices for the upcoming FAIR facility. The FESA framework is installed and operational at the GSI site, giving equipment specialists the possibility to develop FESA classes for device control and data acquisition. This contribution outlines first developments of FESA-based systems for various applications. Prototype DAQ systems based on FESA are the BPM system of the synchrotron SIS18 with data rates up to 7 GBit/s and a large scaler setup for particle counters called LASSIE. FESA classes that address gigabit Ethernet cameras are used for video imaging tasks like scintillator screen observation. Control oriented FESA classes access industrial Programmable Logic Controllers (PLCs) for the slow control of beam diagnostic devices. To monitor temperatures and set fan speeds of VME crates, a class communicating over the CAN bus has been developed.

Poster MOPD86 [3.137 MB]

TUPD05

Diagnostic Scheme for the HITRAP Decelerator

311

G. Vorobjev, C.A. Andre, W.A. Barth, E. Berdermann, M.I. Ciobanu, G. Clemente, L.A. Dahl, P. Forck, P. Gerhard, R. Haseitl, F. Herfurth, M. Kaiser, W. Kaufmann, H.J. Kluge, N. Kotovski, C. Kozhuharov, M.T. Maier, W. Quint, A. Reiter, A. Sokolov, T. Stöhlker
GSI, Darmstadt, Germany
O.K. Kester, J. Pfister, U. Ratzinger, A. Schempp
IAP, Frankfurt am Main, Germany

The HITRAP linear decelerator currently being set up at GSI will provide slow, few keV/u highly charged ions for atomic physics experiments. The expected beam intensity is up to 10⁵ ions per shot. To optimize phase and amplitude of the RF systems intensity, bunch length and kinetic energy of the particles need to be monitored. The bunch length that we need to fit is about 2 ns, which is typically measured by capacitive pickups. However, they do not work for the low beam intensities that we face. We investigated the bunch length with a fast CVD diamond detector working in single particle counting mode. Averaging over 8 shots yields a clear, regular picture of the bunched beam. Energy measurements by capacitive pickups are limited by the presence of intense primary and partially decelerated beam and hence make tuning of the IH-structure impossible. The energy of the decelerated fraction of the beam behind the first deceleration cavity was determined to about 10 % accuracy with a permanent dipole magnet combined with a MCP. Better detector calibration should help reaching the required 1%. Design of the detectors as well as the results of the measurements will be presented.

Paper	Title	Page
MOPD53	Scintillation Screen Investigations for High Energy Heavy Ion Beams at GSI	170
	P. Forck, C.A. Andre, F. Becker, R. Haseitl, A. Reiter, B. Walasek-Höhne GSI, Darmstadt, Germany W. Ensinger, K. Renuka TU Darmstadt, Darmstadt, Germany
	Funding: Funded by the German Ministry of Science (BMBF) under contract No. 06DA9026 Various scintillation screens were irradiated with high energy ion beams as extracted from the GSI synchrotron SIS18. Their imaging properties were studied with the goal to achieve a precise transverse profile determination. Scintillation images were characterized with respect to the light yield and statistical moments of the light distribution i.e. imaged beam width and shape. To study the scintillation properties over a wide range of intensities a 300 MeV/u Uranium ion beam with 10⁴ to 10⁹ particles per pulse was applied. Sensitive scintillators, namely CsI:Tl, YAG:Ce, P43 and Ce-doped glass were investigated for lower beam currents. Ceramics like Al₂O₃, Al₂O₃:Cr, ZrO₂:Y and ZrO₂:Mg as well as Herasil-glass were studied up to the maximum beam currents. For the various screens remarkable differences have been observed, e.g. the recorded profile width varies by nearly a factor of two. The obtained results serve as a basis for an appropriate choice of scintillator materials, which have to cope with the diversity of ion species and intensities at FAIR.
	Poster MOPD53 [1.897 MB]

MOPD60	Beam Induced Fluorescence (BIF) Monitors as a Standard Operating Tool	185
	C.A. Andre, F. Becker, H. Bräuning, P. Forck, R. Haseitl, R. Lonsing, B. Walasek-Höhne GSI, Darmstadt, Germany
	For high current operation at the GSI Heavy Ion UNILAC non intercepting methods for transverse beam profile determination are required. The Beam Induced Fluorescence (BIF) Monitor, an optical measurement device based on the observation of fluorescent light emitted by excited gas molecules was brought to routine operation. Detailed investigations were conducted for various beam parameters to improve the electronics and the optical setup. Up to now, four BIF monitor stations (for detection of both, horizontal and vertical beam profiles) were installed at UNILAC and two additional setups are planned. This contribution reports on first upgrades of the BIF monitors with a Siemens PLC for FESA-based slow controls and hardware protection procedures. The versatile control and display software ProfileView is presented as an easy-to-use and stable beam diagnostic tool for the GSI operating team.
	Poster MOPD60 [3.060 MB]

MOPD86	Development of FESA-based Data Acquisition and Control for FAIR	248
	R. Haseitl, H. Bräuning, T. Hoffmann, K. Lang, R. Singh GSI, Darmstadt, Germany
	GSI has selected the CERN Front End Software Architecture (FESA) to operate future beam diagnostic devices for the upcoming FAIR facility. The FESA framework is installed and operational at the GSI site, giving equipment specialists the possibility to develop FESA classes for device control and data acquisition. This contribution outlines first developments of FESA-based systems for various applications. Prototype DAQ systems based on FESA are the BPM system of the synchrotron SIS18 with data rates up to 7 GBit/s and a large scaler setup for particle counters called LASSIE. FESA classes that address gigabit Ethernet cameras are used for video imaging tasks like scintillator screen observation. Control oriented FESA classes access industrial Programmable Logic Controllers (PLCs) for the slow control of beam diagnostic devices. To monitor temperatures and set fan speeds of VME crates, a class communicating over the CAN bus has been developed.
	Poster MOPD86 [3.137 MB]

TUPD05	Diagnostic Scheme for the HITRAP Decelerator	311
	G. Vorobjev, C.A. Andre, W.A. Barth, E. Berdermann, M.I. Ciobanu, G. Clemente, L.A. Dahl, P. Forck, P. Gerhard, R. Haseitl, F. Herfurth, M. Kaiser, W. Kaufmann, H.J. Kluge, N. Kotovski, C. Kozhuharov, M.T. Maier, W. Quint, A. Reiter, A. Sokolov, T. Stöhlker GSI, Darmstadt, Germany O.K. Kester, J. Pfister, U. Ratzinger, A. Schempp IAP, Frankfurt am Main, Germany
	The HITRAP linear decelerator currently being set up at GSI will provide slow, few keV/u highly charged ions for atomic physics experiments. The expected beam intensity is up to 10⁵ ions per shot. To optimize phase and amplitude of the RF systems intensity, bunch length and kinetic energy of the particles need to be monitored. The bunch length that we need to fit is about 2 ns, which is typically measured by capacitive pickups. However, they do not work for the low beam intensities that we face. We investigated the bunch length with a fast CVD diamond detector working in single particle counting mode. Averaging over 8 shots yields a clear, regular picture of the bunched beam. Energy measurements by capacitive pickups are limited by the presence of intense primary and partially decelerated beam and hence make tuning of the IH-structure impossible. The energy of the decelerated fraction of the beam behind the first deceleration cavity was determined to about 10 % accuracy with a permanent dipole magnet combined with a MCP. Better detector calibration should help reaching the required 1%. Design of the detectors as well as the results of the measurements will be presented.