Published November 4, 2011 | Version v1
Report Metadata-only

Copper Prototype Measurements of the HOM, LOM And SOM Couplers for the ILC Crab Cavity

Creators

  • 1. Lancaster Univ. (United Kingdom)
  • 2. Fermi National Accelerator Lab., Batavia, IL (United States)
  • 3. Daresbury Laboratories (United Kingdom)
  • 4. Stanford Linear Accelerator Center, Menlo Park, CA (United States)

Description

The ILC Crab Cavity is positioned close to the IP and delivered luminosity is very sensitive to the wakefields induced in it by the beam. A set of couplers were designed to couple to and damp the spurious modes of the crab cavity. As the crab cavity operates using a dipole mode, it has different damping requirements from an accelerating cavity. A separate coupler is required for the monopole modes below the operating frequency of 3.9 GHz (known as the LOMs), the opposite polarization of the operating mode (the SOM), and the modes above the operating frequency (the HOMs). Prototypes of each of these couplers have been manufactured out of copper and measured attached to an aluminum nine cell prototype of the cavity and their external Q factors were measured. The results were found to agree well with numerical simulations.

Availability note (English)

Available from http://www.slac.stanford.edu/cgi-wrap/getdoc/slac-pub-14683.pdf; http://www.slac.stanford.edu/cgi-wrap/pubpage?slac-pub-14683.html; PURL: https://www.osti.gov/servlets/purl/1028689/

Additional details

Identifiers

URL
http://www.slac.stanford.edu/cgi-wrap/getdoc/slac-pub-14683.pdf; http://www.slac.stanford.edu/cgi-wrap/pubpage?slac-pub-14683.html; https://www.osti.gov/servlets/purl/1028689/;

Publishing Information

Imprint Pagination
3 p.
Report number
SLAC-PUB--14683

Conference

Title
11. European Particle Accelerator Conference
Acronym
EPAC'08
Dates
23-27 Jun 2008
Place
Genoa (Italy)

INIS

Country of Publication
United States
Country of Input or Organization
United States
INIS RN
43003023
Subject category
S43: PARTICLE ACCELERATORS;
Resource subtype / Literary indicator
Conference, Non-conventional Literature
Descriptors DEI
ACCELERATORS; ALUMINIUM; COPPER; COUPLING; DAMPING; DIPOLES; GHZ RANGE; LINEAR COLLIDERS; LUMINOSITY; MEETINGS; MONOPOLES; POLARIZATION
Descriptors DEC
ACCELERATORS; ELEMENTS; FREQUENCY RANGE; LINEAR ACCELERATORS; METALS; MULTIPOLES; OPTICAL PROPERTIES; PHYSICAL PROPERTIES; TRANSITION ELEMENTS

Optional Information

Contract/Grant/Project number
AC02-76SF00515
Notes
Conf.Proc.C0806233:mopp009,2008
Funding organization
US Department of Energy (United States)