| Paper |
Title |
Page |
| MOPC073 |
Design of an Upgrade to the ALICE Photocathode Electron Gun
|
235 |
| |
- B. L. Militsyn, B. D. Fell, L. B. Jones, J. W. McKenzie, K. J. Middleman
STFC/DL/ASTeC, Daresbury, Warrington, Cheshire
- I. Burrows, R. J. Cash
STFC/DL, Daresbury, Warrington, Cheshire
- S. N. Kosolobov, H. E. Scheibler, A. S. Terekhov
ISP, Novosibirsk
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The design of an upgrade to the GaAs photocathode electron gun of the Energy Recovery Linac Prototype (ERLP) at Daresbury Laboratory is presented. This proposed upgrade includes a reduction of the photocathode diameter from 32 to 10 mm and the installation of a dedicated photocathode preparation system with side loading of the photocathodes. The preparation system forms a united vacuum system with the gun but is separated by a gate valve. This allows for significant improvements to the vacuum conditions in the gun and a reduction of pollution from caesium vapour which improves gun stability under high voltage. This preparation facility will reduce the time taken for photocathode changeover from weeks to hours. The facility should provide photocathodes with higher quantum efficiency due to a more controllable preparation procedure and allows experiments to be performed with photocathodes activated to different levels of electron affinity.
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| MOPP125 |
A Superconducting RF Vertical Test Facility at Daresbury Laboratory
|
850 |
| |
- P. A. Corlett, R. Bate, C. D. Beard, B. D. Fell, P. Goudket, S. M. Pattalwar
STFC/DL/ASTeC, Daresbury, Warrington, Cheshire
- P. K. Ambattu, G. Burt, A. C. Dexter, M. I. Tahir
Cockcroft Institute, Lancaster University, Lancaster
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A superconducting RF vertical test facility (VTF) has been constructed at Daresbury Laboratory for the testing of superconducting RF cavities at 2K. When fully operational, the facility will be capable of testing a 9-cell 1.3 GHz Tesla type cavity. The facility is initially to be configured to perform phase synchronisation experiments between a pair of single cell 3.9GHz ILC crab cavities. These experiments require the cavities to operate at the same frequency; therefore a tuning mechanism has been integrated into the system. The system is described, and data from the initial operation of the facility is presented.
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| WEPP168 |
Mechanical Design of Collimators for the ILC
|
2883 |
| |
- B. D. Fell, D. Angal-Kalinin, S. C. Appleton, J.-L. Fernandez-Hernando, F. Jackson, O. B. Malyshev
STFC/DL/ASTeC, Daresbury, Warrington, Cheshire
- N. Bliss
STFC/DL, Daresbury, Warrington, Cheshire
- G. Ellwood, R. J.S. Greenhalgh
STFC/RAL, Chilton, Didcot, Oxon
- J. D.A. Smith
Cockcroft Institute, Warrington, Cheshire
- N. K. Watson
Birmingham University, Birmingham
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Much attention has been paid to the optimisation of the geometry and material of collimators in the ILC to mitigate the effects of both short-range transverse wakefields and errant beam impacts. We discuss the competing demands imposed by realistic engineering constraints and present a preliminary engineering design for adjustable jaw spoilers for the ILC.
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