CERN Accelerating science

Preprint
Report number	LHC-Project-Report-667 ; CERN-LHC-Project-Report-667
Title	Performance of a Cryogenic Vacuum System (COLDEX) with a LHC Type Proton Beam
Author(s)	Baglin, V ; Collins, I R ; Jenninger, B
Affiliation	(CERN)
Publication	2003
Imprint	25 Aug 2003
Number of pages	9
Note	revised version number 1 submitted on 2003-09-15 09:49:15
Subject category	Accelerators and Storage Rings
Accelerator/Facility, Experiment	CERN LHC
Abstract	The cold bore experiment (COLDEX) installed in the Super Proton Synchrotron (SPS) has been used to study the performance of a vacuum system operating at cryogenic temperatures in the presence of a Large Hadron Collider (LHC) type proton beam. The   2 m long cryostat, which can be cooled below 3 K, is fitted with an actively cooled beam screen which can bee temperature-controlled between 5 and 100 K. Molecular desorption and deposited heat load measurements, with or without gas pre-condensation, have been performed. Implications to the LHC design and operation will be discussed.