| Paper |
Title |
Page |
| MOP020 |
Status of the PITZ Facility Upgrade
|
76 |
| |
- A. Oppelt, K. Abrahamyan, G. Asova, J. W. Baehr, G. Dimitrov, H.-J. Grabosch, L. Hakobyan, Ye. Ivanisenko, S. Khodyachykh, S. A. Korepanov, M. Krasilnikov, B. Petrosyan, R. Spesyvtsev, L. Staykov, F. Stephan
DESY Zeuthen, Zeuthen
- J. H. Han
DESY, Hamburg
- O. Kalekin
Humboldt Universität zu Berlin, Berlin
- F. Marhauser, R. Richter, E. Weihreter
BESSY GmbH, Berlin
- J. R. Roensch
Uni HH, Hamburg
|
|
| |
The upgrade of the Photo Injector Test Facility at DESY in Zeuthen towards the PITZ2 stage is continuously ongoing. In Spring 2006, an intermediate stage was taken into operation (PITZ1.6), including a new gun cavity that has been tuned and conditioned. Currently, three new emittance measurement systems are being installed along the beamline. After their commissioning, studies of the emittance conservation principle will be possible when using the available booster cavity. In the paper, the results of the RF commissioning of the new gun and the first beam measurements using recently installed diagnostics devices will be presented. The ongoing developments of further new diagnostics components will be discussed as well.
|
|
| THP033 |
Pulsed RF Heating Particularities in Normal-Conducting L-band Cavities
|
646 |
| |
- V. V. Paramonov, A. K. Skasyrskaya
RAS/INR, Moscow
- K. Floettmann
DESY, Hamburg
- F. Stephan
DESY Zeuthen, Zeuthen
|
|
| |
For present projects, such as X-FEL and ILC, the SC technology is chosen for the main linacs. However, in some special parts, NC cavities are applied, operating with high electric and magnetic fields. RF gun cavities with an electric field up to 60 MV/m at the photo cathode are now under development. Capture cavities in the ILC positron source should operate with an accelerating gradient of up to 15 MV/m, practically the same value (14 MV/m), as for the CDS booster cavity in the Photo Injector Test Facility at DESY in Zeuthen (PITZ). High field strength leads to high specific RF heat loading. In combination with long RF pulses (~ 1ms) it results in substantial surface temperature rise, small cavity shape deformations and measurable frequency shifts. In this report we discuss both particularities and some general regularities related to long pulse operation of L-band cavities. Results of 3D numerical simulations for cavity surface temperature, displacements distributions and corresponding frequency shifts for different cavities are presented and compared with existing experimental data. The presented results will give the input for cavities optimization and sub-systems improvements.
|
|