Electron Cloud: SEY Test, Project 1
A grooved profile surface reduces the effective SEY on the surface due to reduced escape probability of the secondary electrons. We measured the SEY of prototype rectangular grooved samples showing a very promising reduction of the SEY < 0.7. Prototype chambers with a grooved surface profile are under development for installation in the PEP-II LER. The prototype chambers are made in aluminum with the appropriate TiN coatings and diagnostic equipment. The actual groove chamber project has designed rectangular grooves with depth ~4mm.
Status: Completed extrusion chamber ready for installation in Nov. 2006.
Updated drawings package
Chamber drawings automatically updated: V:\AD\PEP-II Upgrade\Projects\2004 AIP\ecloud\ (SLAC only)
| V:\AD\PEP-II Upgrade\Projects\2004 AIP\ecloud\ (SLAC only) | |||
| DRIFT CHAMBER ASSY | extr.par | ||
| extr1mm.par | |||
| extr1mm_r2.par | |||
| extr1mm_r3.par | |||
| extr2.dft | extr2.par | ||
| extr2mm.par | |||
Meetings
Next Meeting scheduled for: Wednesday 10:00 AM, October --, 2005, Alexander Room in Building 280, SLAC.
Tuesday, March 8 meeting: M. Pivi "SEY full test in PEP-II updates".
Please request here the minutes of the 2004 Meetings.
Project costs
Acc. Design Responsible: M. Pivi, SLAC.
Collaboration: ILC Div. SLAC in collaboration with PEP-II.
Layout chamber construction: T. Raubenheimer, J. Seeman, A. Kulikov, N. Kurita, A. Novokhatski, M. Pivi, T. Markiewicz.
Designers: D. Blankenship, N. Kurita.
Physics experiment: R. Kirby, M. Pivi, G. Collet, postdoc LC Div.
TiN Coating: Daniel Wright.
Chamber installation in PEP-II: K. Ratcliffe, T. Smith, K. Jobe, M. Ross, LC and PEP-II personnel.
Post your comments and latest results here.