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Kempson, V.C.

Paper Title Page
TUPCH120 The Diamond Light Source Booster RF System 1295
 
  • C. Christou, V.C. Kempson
    Diamond, Oxfordshire
  • K. Dunkel
    ACCEL, Bergisch Gladbach
  • A. Fabris
    ELETTRA, Basovizza, Trieste
 
  The Diamond Light Source (DLS) accelerator complex can be divided into three major components; a 3 GeV 561 m circumference storage ring, a 158.4 m circumference full-energy booster synchrotron and a 100 MeV pre-injector linac. This paper describes the design and presents commissioning results of the RF system for the booster synchrotron. Booster RF commissioning took place in late 2005 and early 2006 and involved the setting-into-operation of a 60 kW IOT amplifier, supplied by Thales Broadcast and Multimedia, a 5-cell copper cavity, manufactured by Accel Instruments, and a low-level RF system designed and built by Sincrotrone Trieste SCpA.  
WEPLS067 Magnets for the 3 GeV Booster Synchrotron for the Diamond Light Source 2535
 
  • S.P. Mhaskar, C.P. Bailey, G.M.A. Duller, V.C. Kempson, N. Marks
    Diamond, Oxfordshire
  • F. Bødker, N. Hauge, L.H. Helmersen
    Danfysik A/S, Jyllinge
 
  The Diamond Booster is a full energy injector for the Diamond Storage Ring. It is designed to accelerate electrons from 100 MeV to 3 GeV at a 5 Hz repetition rate. The lattice is a missing dipole FODO lattice consisting of 22 unit cells with 36 dipoles, 44 quadrupoles, 28 sextupoles and 44 correctors, distributed around a circumference of 158.4 m. The dipole field will be ramped from 0.026 T at injection to 0.809 T at 3 GeV; the quadrupoles will have a maximum operating gradient of 15T/m. The initial design of pole tip profiles was carried at Diamond, with the magnets then manufactured by DANFYSIK A/S as part of preassembled girder units (44 in total), complete with vacuum vessels. High quality was required to meet the accelerator physics requirements of alignment, positioning accuracies and field tolerances over the required good field apertures. Materials, ramp rates and field range have been selected to obtain almost linear response during magnet ramping. This paper describes the main features of the magnetic designs and measurement results; the magnets have now been delivered and installed at Diamond.  
THPCH167 Commissioning of the Diamond Pre-injector Linac 3185
 
  • C. Christou, V.C. Kempson
    Diamond, Oxfordshire
  • K. Dunkel, C. Piel
    ACCEL, Bergisch Gladbach
 
  Commissioning of the linac for the Diamond Light Source (DLS) was completed in October 2005. The linac was supplied by Accel Instruments as a complete system, with DLS providing beam diagnostics, beam analysis software, control system hardware and standard vacuum components. Much of the beam analysis was carried out using the first part of the Linac to Booster transfer line (LTB), which was designed and built by DLS. Operation of the linac and LTB at 100 MeV in long-pulse and short-pulse modes of operation was demonstrated, and all operational parameters were measured to be within specification.  
THPLS028 Pulsed Magnets and Pulser Units for the Booster and Storage Ring of the Diamond Light Source 3341
 
  • V.C. Kempson, J.A. Dobbing
    Diamond, Oxfordshire
  • C.E. Hansen, N. Hauge, G. Hilleke
    Danfysik A/S, Jyllinge
 
  The Diamond booster and storage ring complex require ten pulsed magnet systems, five for the booster (injection and extraction) and five for the storage ring injection. Each has its own specific design criteria, although commonality of approach has been applied wherever possible. This paper describes the design principles and construction method for the various systems and presents the results of power supply tests and magnetic measurements. Finally, initial experience during the Diamond beam commissioning is discussed.  
THPLS029 Commissioning of the Booster Synchrotron for the Diamond Light Source 3344
 
  • V.C. Kempson, R. Bartolini, C. Christou, J.A. Dobbing, G.M.A. Duller, M.T. Heron, I.P.S. Martin, G. Rehm, J.H. Rowland, B. Singh
    Diamond, Oxfordshire
 
  The Diamond booster is a 158 m circumference, 5 Hz synchrotron which accelerates the 100 MeV electron beam from a linac to 3 GeV for full-energy injection into the Diamond storage ring. The booster has been commissioned in the first few months of 2006, following successful initial 100 MeV trials at the very end of 2005. The injection and ramping process, orbit correction and essential beam physics measurements are discussed as are extraction and beam transport to the storage ring.  
THPLS030 Beam Optic Measurements for the Booster Synchrotron of the Diamond Light Source 3347
 
  • B. Singh, R. Bartolini, C. Christou, V.C. Kempson, I.P.S. Martin
    Diamond, Oxfordshire
  • J.K. Jones
    CCLRC/DL/ASTeC, Daresbury, Warrington, Cheshire
 
  The booster synchrotron of the Diamond Light Source is a full energy injector ramping from 100 MeV to 3 GeV with a repetition rate of 5 Hz. As part of the booster commissioning, beam optic measurements were performed to characterize the booster performance. Through the use of the beam position monitors, orbit corrections, tune and chromaticity measurements were performed at injection energy and during the ramp. A first comparison with the booster model is also discussed.