Published February 17, 2015 | Version v1
Miscellaneous Metadata-only

Distribution of Heating from Untrapped HOM Radiation in the LCLS-II Cryomodules

Creators

  • 1. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  • 2. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)

Description

The superconducting cavities in the CW linacs of LCLS-II will operate at 2 K, where cooling is very expensive. One source of heat is presented by the higher order mode (HOM) power deposited by the beam. Due to the very short bunch length, especially in the L3 region, the LCLS-II beam spectrum extends into the terahertz range. Ceramic absorbers, at 70 K between cryomodules, are meant to absorb much of this power. In this report we perform two kinds of calculations to estimate the effectiveness of the absorbers and the fractional power that remains to be removed at 2 K

Availability note (English)

Available from http://www.slac.stanford.edu/cgi-wrap/getdoc/slac-pub-16231.pdf; PURL: http://www.osti.gov/servlets/purl/1171471/

Additional details

Identifiers

URL
http://www.slac.stanford.edu/cgi-wrap/getdoc/slac-pub-16231.pdf; http://www.osti.gov/servlets/purl/1171471/;

Publishing Information

Imprint Pagination
9 p.
Report number
SLAC-PUB--16231

Conference

Title
Presented at ICFA Mini Workshop on Higher Order Modes in Superconducting Cavities
Acronym
HOMSC14
Dates
14-16 Jul 2014
Place
Batavia, IL (United States)

INIS

Country of Publication
United States
Country of Input or Organization
United States
INIS RN
47028539
Subject category
S43: PARTICLE ACCELERATORS;
Resource subtype / Literary indicator
Conference, Non-conventional Literature
Descriptors DEI
BEAMS; CERAMICS; COOLING; FREE ELECTRON LASERS; HEAT SINKS; HEATING; LINEAR ACCELERATORS; SUPERCONDUCTING CAVITY RESONATORS; TEMPERATURE DISTRIBUTION; TEMPERATURE RANGE 0000-0013 K
Descriptors DEC
ACCELERATORS; CAVITY RESONATORS; ELECTRONIC EQUIPMENT; EQUIPMENT; LASERS; RESONATORS; SINKS; SUPERCONDUCTING DEVICES; TEMPERATURE RANGE

Optional Information

Contract/Grant/Project number
AC02-76SF00515
Funding organization
US DOE Office of Science (DOE SC) (United States)
Secondary number(s)
OSTIID--1171471