Title :
Secondary electron yield and groove chamber tests in PEP-II
Author :
Pivi, M. ; Collet, G. ; King, F. ; Kirby, R. ; Markiewicz, T. ; Raubenheimer, T. ; Seeman, J. ; Wang, L. ; Le Pimpec, F.
Author_Institution :
SLAC, Menlo Park
Abstract :
Possible remedies for the electron cloud in positron damping ring (DR) of the International Linear Collider (ILC) includes thin-film coatings, surface conditioning, photon antechamber, clearing electrodes and chamber with grooves or slots. We installed chambers in the PEP-II Low Energy Ring (LER) to monitor the secondary electron yield (SEY) of TiN, TiZrV (NEC) and technical accelerator materials under the effect of electron and photon conditioning in situ. We have also installed chambers with rectangular grooves in straight sections to test this possible mitigation technique. In this paper, we describe the ILC R&D ongoing effort at SLAC to reduce the electron cloud effect in the damping ring, the chambers installation in the PEP-II and latest results.
Keywords :
electrodes; electron accelerators; linear accelerators; particle beam bunching; particle beam stability; storage rings; thin films; titanium compounds; International Linear Collider; PEP-II Low Energy Ring; SLAC; beam instability; bunch length; electrodes; electron cloud effect; groove chamber; photon antechamber; positron damping ring; rectangular grooves; secondary electron yield; technical accelerator materials; thin-film coatings; Clouds; Coatings; Condition monitoring; Damping; Electrodes; Electrons; Photon collider; Positrons; Testing; Transistors;
Conference_Titel :
Particle Accelerator Conference, 2007. PAC. IEEE
Conference_Location :
Albuquerque, NM
Print_ISBN :
978-1-4244-0916-7
DOI :
10.1109/PAC.2007.4441123
