ILC Global Design Effort

Accelerator Global Group 3 - Operations and Availability
Summaries, Question Responses and Supporting Documents

Updated 12 September 2005

Accelerator GG3 workspace from Snowmass


- Reliability of the large number of components is an issue
- undulator positron source with sufficiently intense keep-alive beam yields comparable availability to conventional source
- availability increases from 64% to 78% when going from 1 to 2 tunnels with all other parameters (e.g. MTBFs) unchanged

- phased commissioning (during construction) is important
- damping rings need particular time and should be early available
- an electron source is mandatory for the damping ring commissioning. (DR polarity should be switchable in a (few) shift(s))

- The design of the Machine Protection System (MPS) has barely begun. It is likely to include:
- hardware monitoring of key components
- abort dumps at end of linac
- pilot bunch to diagnose sane orbit for the rest of the train

Brief Summary Document

Responses to questions
44 - Electron source (pdf)
BCD Links

WG/GG summaries

Question responses


Notes from decisions meeting (MS Word)

Accelerator WGs - Draft decisions process/schedule (xls)

Baseline and Alternative Configuration Document (pdf)


Email  These comments and any supporting documents included will be considered during the 22 September meeting.