| Title: |
Study of Distributed Ion-Pumps in CESR |
| Authors: |
Yulin Li; Roberto Kersevan; Nariman Mistry |
| Contributors: |
The Pennsylvania State University CiteSeerX Archives |
| Source: |
http://www.lns.cornell.edu/public/CBN/1997/CBN97-11/CBN97-11.ps. |
| Publication Year: |
1997 |
| Collection: |
CiteSeerX |
| Description: |
It is desirable to reduce anode voltage of distributed ion pumps (DIPs) in CESR in order to suppress a beam instability caused by the leakage electric field from the DIPs and to extend the lifetime of the DIPs and DIP power supplies. The DIP pumping speed is measured as a function of anode voltage with and without stored beam. It is found that the DIP pumping speed remains relative unchanged with the anode voltage changing from 'normal' operation voltage 7.6 kV to as low as 1.8 kV , when there is stored beam in CESR. On the other hand, the pumping speed drops rapidly as the anode voltage is decreased below 5 kV with no stored beam in CESR. A simple model is used to explain the operation of DIPs under the influence of the stored beam. 1. Introduction In the arc regions of CESR, the beam chamber is maintained at ultrahigh vacuum condition, typically 2~3x10 -9 torr with 300 mA stored electron and positron beams by lumped ion pumps and distributed ion pumps. Within the length of each n. |
| Document Type: |
text |
| File Description: |
application/postscript |
| Language: |
English |
| Relation: |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.27.211 |
| Availability: |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.27.211; http://www.lns.cornell.edu/public/CBN/1997/CBN97-11/CBN97-11.ps |
| Rights: |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
| Accession Number: |
edsbas.A6C4A9C9 |
| Database: |
BASE |