Dear ILC GDE collaborators and the Physics/Detector Community
We are pleased to announce 'the First Baseline Assessment Workshop'
(the 1st BAW) to be organized by ILC-GDE in focusing on the
'Single-tunnel High Level RF Systems' and 'Accelerating Gradient'.
It will be held on the Tsukuba Campus of KEK, Sept. 7 - 10, 2010,
as proposed below.
For your information,
The 2nd BAW is also expected to be organized in the middle January, 2011
(most likely in the week of January 17), in order to discuss 'Reduced
RF power'
and 'e+ source location' further directly impacting on the ILC
physics performance.
Further detail will be announced soon.
We would thank you for your kind understanding of the workshop
objectives
to establish our open and close communication to reach the best
consensus
for the ILC design and our R&D effort in the Technical Design Phase 2.
With our best regards,
Akira Yamamoto, Marc Ross, and Nick Walker
ILC-GDE Project Managers
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{The 1st Announcement: dated May 3, 2010}
Preliminary Announcement of the 1st Baseline Assessment Workshop on
'Single-tunnel HLRF Systems' and 'Accelerating Gradient'
Dates: September 7 - 10, 2010 (Tue. - Fri.)
Place: KEK
Subjects:
1. Single-tunnel High Level RF System (Sept. 7 - 8)
2. Accelerating Gradient of SCRF Cavity (Sept. 9 - 10)
Objectives and Goals:
- Assessment of technical implication, proposed in SB2009,
- Impact across system interfaces, cost, and schedule
- Consensus to be achieved with the GDE and Physics/Detector
collaborators,
- Preparation for recommendations to the Top Level Change Control (TLCC)
evaluation panel (chaired by GDE Director),
Spirit to organize the workshop:
- Face to face meetings,
- Open to all stakeholders,
- Plenary sessions and discussions,
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More Details are proposed as follows:
Meeting announcement
- widely announced to the GDE and Physics/Detector collaborators,
Participants to the workshop;
- Open for everybody,
- Key participants mandatory requested:
- GDE PMs (Chair)
- GDE ADI team / TAG leaders
- Physics/Detector Representatives
- External experts (invited, TBD).
Daily Agenda:
Sept. 7: Single-tunnel HLRF systems, focusing on KCS,
Sept. 8: Single-tunnel HLRF systems, focusing on DRFS,
and summary/recommendation,
Sept. 9: Accelerating gradient, focusing SCRF cavity research
toward long-term improvement of field gradient
Sep. 10: Accelerator gradient, focusing on the ILC operational
gradient, including necessary operational margin in
cavity/cryomodule and in HLRF/LLRF and reliable
beam acceleration,
and summary/recommendation.
Subjects of discussions expected:
1. Single-tunnel HLRF systems
KCS:
- Tolerances on RF amplitude and phase within a cluster,
- Operational margin of RF power, and tuning and control strategy,
DRFS:
- Assembly. sorting, and installation strategy and the tolerances,
- R&D required/extended in further TDP including radiation shielding,
klystron lifetime, redundancies,
Backups:
- Ordinal RF system in RDR, in single tunnel, just in case, as the
final backup,
2. Accelerator Gradient
Strategy fo Gradient Improvement:
- material/fabrication, surface process, intrumentation & reparing,
- strategy to overcome 'quench', and 'field emission',
- improvement of gradient and the successful yield,
Strategy for Accelerating Gradient in ILC:
- Overview/scope of the 'production yield' progress and expectation,
including
acceptable spread of the gradient (to allow average gradient),
- Specifications of Gradient, Q0, and Cryogenic-load (limited by
emitted radiation)
including the spread and yield in the cavity vertical test,
- Specifications of Gradient, Q0, and Cryogenic-load including the
gradient spread and
operational margin in the cryomodule test,
- Specifications of Gradient and Q0. and Cryogenic-load including
the gradient spread
and the operational margin in beam acceleration,
- Strategy to establish the way to control 'emitted radiation'
resulting in cryogenic-load
and usable gradient limitation,
- Strategy for tuning and control, including tolerances and
availability margin,
- Impact on other accelerator systems, CFS, RF, Cryogenics, and
'cost'.
Preparation for the workshop:
- SCRF and AD/I monthly webex meetings will be used to assign homework,
and to exchange the progress and discussions,
- The first, next SCRF meeting is to be held at May 7, and
AD/I (hopefully during IPAC, on May 26).
The 1st BAW URL and Indico Agenda:
The 1st BAW UR, the Indico Agenda, and the registration form are
to be prepared in cooperation with GDE and KEK-LC office secretaries.
Any questions and/or advices
- Please send any of your advices to the GDE Project Managers:
Akira Yamamoto : [log in to unmask]
Marc Ross: [log in to unmask]
Nick Walker: [log in to unmask]
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