insertion

Paper	Title	Other Keywords	Page
TUXMA01	LHC Status	dipole, quadrupole, cryogenics, injection	46
	L. R. Evans CERN, Geneva
	The installation of the Large Hadron Collider at CERN is now approaching completion. Almost 1100 of the 1232 main bending magnets are installed and the whole ring will be installed by the end of March 2007. Emphasis is now moving from installation to commissioning, with the cool down of the first of the 8 sectors to liquid helium temperature well underway. In the other sectors, interconnect work is proceeding at a satisfactory pace and will be finished by the end of August. It is foreseen to inject the first beam into the LHC in November with the objective of having first collisions at the injection energy (450 GeV/c) in order to debug the machine and detectors before stopping for the annual winter shutdown. During this time, the detector installation will be finished and the machine will be pushed to full current ready for the first physics run at 7 TeV per beam in 2008.
	Slides
TUPMA028	Status of the Photon Factory	undulator, storage-ring, photon, factory	142
	S. Sakanaka, S. Asaoka, W. X. Cheng, K. Haga, K. Harada, T. Honda, T. Ieiri, S. Isagawa, M. Izawa, T. Kageyama, T. Kasuga, M. Kikuchi, Y. Kobayashi, K. Kudo, H. Maezawa, A. Mishina, T. Mitsuhashi, T. Miyajima, H. Miyauchi, S. Nagahashi, T. T. Nakamura, H. Nakanishi, T. Nogami, T. Obina, K. Oide, M. Ono, T. Ozaki, C. O. Pak, H. Sakai, Y. Sakamoto, H. Sasaki, Y. Sato, T. Shioya, M. Tadano, T. Takahashi, S. Takasaki, Y. Tanimoto, M. Tejima, K. Tsuchiya, T. Uchiyama, A. Ueda, K. Umemori, S. Yamamoto, S. I. Yoshimoto KEK, Ibaraki
	Two synchrotron light sources are in operation at the High Energy Accelerator Research Organization (KEK): the Photon Factory (PF) storage ring and the Photon Factory Advanced Ring (PF-AR). The 2.5-GeV PF storage ring was largely upgraded during March to September, 2005. Through this upgrade, existing ten straight sections were extended in length, and four short-straight sections were newly created. New short-period undulators were then installed in the new sections. Other developments, including a top-up injection, are in preparation. The other light source, the 6.5-GeV PF-AR, is routinely operated with a single bunch. It provides high-flux hard X-rays for research including time-resolved pulse X-ray experiments. In the PF-AR, four in-vacuum undulators and one elliptically polarized multipole wiggler are in operation. Moreover, a new in-vacuum undulator was installed in summer, 2006. Some operational developments were also carried out. In this presentation, we report both hardware and operational advances of the PF and the PF-AR storage rings.
TUPMA031	Development of Trigger and Clock Delay Module with Ultra-wide Range and High Precision	laser, controls, synchrotron, electron	145
	T. Ohshima, Y. Fukuyama, J. Kim JASRI/SPring-8, Hyogo-ken E. Nonoshita, H. Sengoku Candox Systems Inc., Gyoda city, Saitama perfecture Y. T. Tanaka RIKEN Spring-8 Harima, Hyogo
	Pump and probe experiments using pulse lasers and synchrotron radiation require precise timing relation between the laser pulse and the RF signal of the accelerator. The pulse laser needs clock signal for a mode-locked oscillator and trigger signal to a regenerative oscillator. The delay time of these two signals were usually adjusted by using a mechanical phase shifter or a cable delay. They have disadvantages of short tuning range or discontinuity in the clock signal. We developed a new delay module, which can continuously change the delay time with the range of ±1 s and the precision better than 5 ps. The key point of the module is combination of an IQ modulator and a synchronous counter. The IQ modulator can change the phase of the RF signal with infinite amount with high precision in both plus and minus direction, which is used to produce the laser clock. The phase-modulated RF signal is also fed to the synchronous counter and its output is used to the trigger of the regenerative oscillator. The effectiveness of this module was confirmed by an experiment carried out at the SPring-8. Detail composition of the module, its application and performance are described in the paper.
WEPMA090	Status of the Superconducting Insertion Devices Control System at TLS	power-supply, controls, insertion-device, cryogenics	455
	K. H. Hu, J. Chen, K. T. Hsu, S. Y. Hsu, C. H. Kuo, D. Lee NSRRC, Hsinchu
	Superconducting insertion devices installed at Taiwan Light Source to service fast growth X-ray users’ community. Control system is implemented to support the operation of all these superconducting insertion devices. Control system coordinates the operation of the main power supply and the trimming power supply to charge/discharge the magnet and provide essential interlock protection for the coils and vacuum ducts. Quench detection and various cryogenic interlock are designed to protect the system. Friendly user interface and control applications are developed to support routine operation. Diagnostic the trip of superconducting insertion devices related to machine operation is also addressed. Design consideration and details of the implementation will be summary in this report.
WEPMA143	High-Power, Low-Loss, Radial Rf Power Dividers/Combiners	impedance, coupling, simulation, controls	520
	A. Jain, A. Gupta, P. R. Hannurkar, D. Sharma RRCAT, Indore (M. P.)
	A 20 kW Solid State Power Amplifier (SSPA) at 352 MHz development is in progress at RRCAT. This design uses radial splitting and combining architecture in which the signal is divided into a number of individual parts. Each individual part is then amplified by a respective amplifier of 200 W. The outputs of the amplifiers are then combined into a single output that achieves final output power of the order of 1.5 kW to 4 kW. As a part of this system, two high power combiners have been designed and developed. One is 8 way with output ports opposite to input port. Second one is 16 way with radial output ports. Both of these designs are compact with 20 cm diameter of outer radial disk. Input ports are N connector, while output port is 15/8” rigid coaxial line. Measured performance of these two designs shows insertion loss of 0.6 dB and input VSWR of 1.09. Radial architecture uses in-phase, non-resonant radial transmission line structures.
THZMA01	Status of SOLEIL Project	vacuum, storage-ring, controls, feedback	578
	L. S. Nadolski, J. C. Besson, P. Brunelle, A. Buteau, L. Cassinari, M.-E. Couprie, J.-C. Denard, J.-M. Filhol, C. Herbeaux, J.-F. Lamarre, V. Le Roux, P. Lebasque, A. Lestrade, M.-P. Level, A. Loulergue, A. Madur, P. Marchand, A. Nadji, R. Nagaoka, B. Pottin, J. B. Pruvost, F. Ribeiro, M.-A. Tordeux SOLEIL, Gif-sur-Yvette
	SOLEIL, the 2.75 GeV new French Synchrotron Radiation Facility, located near Paris, is under commissioning. Here are reported the first main results obtained on the storage ring. The beam dynamics characterisation of the 3.7 nm.rad optics is presented, as well as the first measurements of the instability thresholds. Furthermore comparison is made with expectations of the linear optics model and instability calculations. First experience with innovative devices and technologies is also presented: TANGO control system, BPM system, extensive use of NEG coating vessels, RF system (Solid state amplifiers, and superconducting cavities). Six insertion devices accommodating a wide energy range from 5 eV to 50 keV (in-vacuum, Apple II, large period electromagnetic types) are now installed on the machine and some of them are giving the first photon beam to the beamlines. Finally a roadmap towards beam delivery to users will be presented (orbit stability, beam filling patterns, top-up operation).
	Slides
THC3MA01	Operation and Recent Developments at the Siam Photon Source	photon, storage-ring, synchrotron, insertion-device	607
	P. Klysubun, S. Cheedket, G. G. Hoyes, C. Kwankasem, M. Oyamada, S. Rugmai, S. Rujirawat NSRC, Nakhon Ratchasima
	The Siam Photon Source (SPS) is a dedicated synchrotron radiation facility located in Nakhon Ratchasima, Thailand. After successful commissioning and recent energy upgrade from 1.0 GeV to 1.2 GeV, the Siam Photon Source is currently well into user mode of operation. The light source is now providing routinely synchrotron radiation in the vacuum ultraviolet and soft x-ray spectral ranges to both internal and external researchers. In this report we describe the overview of the current machine performance including user availability, the progresses made recently, and the planned machine improvements, which emphasizes on improving beam stability and machine reliability. Plan to install two insertion devices, a permanent magnet planar undulator and a superconducting magnet wavelength shifter, is also discussed.
	Slides
THPMA117	Design and Fabrication of Arups U6 Undulator at PLS	undulator, controls, insertion-device, synchrotron	806
	H.-G. Lee, C. W. Chung, H. S. Han, Y. G. Jung, D. E. Kim, W. W. Lee, K.-H. Park, H. S. Suh PAL, Pohang, Kyungbuk
	Pohang Accelerator Laboratory(PAL) had developed and installed an U6 undulator recently to utilize brilliant undulator radiation for ARUPS (Angle Resolved Ultraviolet Photoemission) beamline at Pohang Light Source (PLS). The U6 is a hybrid type device with period of 6 cm, minimum gap of 18 mm, maximum flux density of 0.85 Tesla and total magnetic structure length of 1830 mm. The support locations and structure of an insertion device are optimized to achieve a minimum deflection due to the magnetic loads. A Finite Element Analysis (FEA) is performed to find out the amount of maximum deflection and optimal support positions on the backing beam. The optimized maximu deflection is estimated to be about 11.6 ?, while the deflection before any optimization is 48.8 ?. In this report, all the mechanical design, fabrication and assembly details of the PLS U6 undulator are described.