Published June 1, 2010 | Version v1
Report Metadata-only

Higher Order Modes in Third Harmonic Cavities for XFEL/FLASH

Creators

  • 1. Cockcroft Inst. Accel. Sci. Tech., Daresbury (United Kingdom)
  • 2. University of Manchester, Manchester (United Kingdom)
  • 3. DESY, Hamburg (Germany)
  • 4. Fermi National Accelerator Lab., Batavia, IL (United States)
  • 5. Rostock U. (Germany)
  • 6. Rostock U. (DE)
  • 7. DESY, Hamburg (DE)
  • 8. Cockcroft Inst. Accel. Sci. Tech., Daresbury (GB)
  • 9. University of Manchester, Manchester (GB)

Description

We analyse higher order modes in the 3.9 GHz bunch shaping cavities recently installed in the FLASH facility at DESY. We report on recent experimental results on the frequency spectrum from probe based measurements made at CMTB at DESY. These are compared to those predicted by finite difference and finite element computer codes. This study is focused mainly on the dipole component of the multi-pole expansion of the wakefield. The modes are readily identifiable as single-cavity modes provided the frequencies of these modes are below the cut-off of the inter-connecting beam pipes. The modes above cut-off are coupled to the 4 cavities and are distinct from single cavity modes.

Availability note (English)

Available from Fermi National Accelerator Laboratory, Batavia, IL (US)

Additional details

Identifiers

arXiv
arXiv:1006.0085;

Publishing Information

Imprint Pagination
3 p.
Report number
FERMILAB-CONF--10-302-TD

Conference

Title
1. International Particle Accelerator Conference
Acronym
IPAC'10
Dates
23-28 May 2010
Place
Kyoto (Japan)

INIS

Country of Publication
United States
Country of Input or Organization
United States
INIS RN
41108945
Subject category
S43: PARTICLE ACCELERATORS;
Resource subtype / Literary indicator
Conference, Non-conventional Literature
Descriptors DEI
ACCELERATORS; BEAM BUNCHING; CAVITIES; COMPUTER CODES; DIPOLES; HARMONICS
Descriptors DEC
BEAM DYNAMICS; DYNAMICS; MECHANICS; MULTIPOLES; OSCILLATIONS

Optional Information

Contract/Grant/Project number
arXiv eprint number arXiv:1006.0085; AC02-76CH03000
Funding organization
US Department of Energy (United States)