DocumentCode :
2900917
Title :
Results on 9-cell ILC and 9-cell re-entrant cavities
Author :
Padamsee, H. ; Crawford, A.C. ; Cole, J.R. ; Pekeler, M. ; Ashmanskas, B.
Author_Institution :
Cornell Univ., Ithaca
fYear :
2007
fDate :
25-29 June 2007
Firstpage :
2343
Lastpage :
2345
Abstract :
We have recently upgraded our chemical treatment facility, high pressure rinsing system and low temperature RF test set-up to prepare and test 9-cell cavities for ILC. After removal of 120 mum by BCP we reached 26 MV/m accelerating field limited by the high-field Q-slope. There was no quench and no field emission, showing that our facilities are well qualified. We have also extended our vertical electropolishing system to 9-cell cavities. Previously we successfully used vertical electropolishing for one-cell cavities of the re-entrant shape to reach 47 MV/m accelerating. Test results on 9-cell electropolished cavities will be presented. AES has manufactured the first 9-cell cavity with re-entrant cell shapes. The surface magnetic field is 10% lower than for the standard TESLA-shape cavity. Half-cells were electropolished 100 um before welding. We will report on the first 9-cell re-entrant cavity.
Keywords :
accelerator RF systems; accelerator cavities; electrolytic polishing; linear accelerators; welding; 9-cell ILC; BCP; TESLA-shape cavity; chemical treatment facility; field emission; high pressure rinsing system; high-field Q-slope; low temperature RF test set-up; quenching; reentrant cavity; surface magnetic field; vertical electropolishing system; welding; Acceleration; Business continuity; Chemicals; Magnetic fields; Manufacturing; Radio frequency; Shape; System testing; Temperature; Welding;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Particle Accelerator Conference, 2007. PAC. IEEE
Conference_Location :
Albuquerque, NM
Print_ISBN :
978-1-4244-0916-7
Type :
conf
DOI :
10.1109/PAC.2007.4441244
Filename :
4441244
Link To Document :
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