| Paper | Title | Page |
|---|
| TUP48 | Dry-ICE Cleaning: The Most Effective Cleaning Process for SRF Cavities? | 239 |
| | - D. Reschke, A. Brinkmann, K. Floettmann, D. Klinke, J. Ziegler
DESY - D. Werner, R. Grimme, Ch. Zorn
Fraunhofer IPA
| |
| | The dry-ice sublimation-impulse cleaning (DIC)
technique using a two component ring jet has been proven
as a highly efficient cleaning process for niobium and
copper surfaces. The liquid carbon dioxide flows through
a ring-type nozzle assembled in a purpose-built cleaning
head, expands to form a dry-ice / gas mixture and is
accelerated by the surrounding nitrogen. A set-up for the
HORIZONTAL cleaning of single-cell niobium cavities
has been successfully commissioned during the last years.
A preliminary parameter set for effective final cleaning is
established. Several cavities have been cleaned and tested
without any detectable field emission up to 36 MV/m. As
application of the DIC technique might result in
additional cleaning potential for accelerator structures, an
extension of the set-up and testing of nine-cell cavities is
planned until mid of 2008. Furthermore, DIC was applied
to the copper injector "gun" cavity for TTF/FLASH [1]
recently. In order to reduce the dark current of the gun
cavity, a vertical cleaning setup was developed and tested. | |