|
|
|
[../_private/jumpto.html] |
|
|
|
[../_private/jumpto.html] |
The Working Group should cover all issues related to systems starting from (and including) the sources, up to the start of the main linac. There are certainly particular issues that it will be important to address during the workshop, but we aim to be inclusive in discussing ideas that people want to raise, as long as they are relevant to the injection systems.
Topics of
discussion are likely to fall into one of two categories:
A.
Systems described in (or closely resembling those described in) current
proposals for a future linear collider.
Examples include the
TESLA positron source and the NLC Main Damping Ring.
A1.
What are the current design performance levels of the injection systems,
as demonstrated by recent R&D?
A2.
What effects limit the performance, and how well are these effects
understood?
A3.
What are the significant technical risks?
A4.
What R&D is required to:
(a)
demonstrate the validity of present designs (if necessary);
(b)
produce simpler/cheaper systems with similar performance;
(c)
reduce the technical risk;
(d)
improve the performance of the systems?
A5.
What are the likely timescales/costs/benefits, of R&D identified in
(4)?
A6.
What are the opportunities for collaboration on the different systems?
A7.
Could the design for one machine be used with benefits for another
machine?
B.
Systems with novel features, or providing capability not presently
included in LC descriptions.
Examples
include polarized positron sources, or damping rings consisting entirely of
combined function dipoles.
B1.
What are the likely benefits of the proposed system, over the existing
design (if any exists)?
B2.
What other systems are impacted by changing the design?
B3.
What R&D is required to develop the new concept into a practical
design with acceptable technical risk?
B4.
What are the likely timescales/costs/benefits, of R&D identified in
(3)?
B5.
What are the opportunities for collaboration?
We
will draw up a more detailed list of issues that we would like to cover, and
invite speakers as necessary. We
welcome proposals from people wishing to present material, though we shall try
to avoid packing the available 18 hours with presentations, leaving no time
either for discussions, or for people who come to the workshop with
presentations we have not planned for. Therefore,
we propose to set a tentative time limit of 25 minutes (plus five minutes for
questions) for most presentations.
We
shall aim to group presentations according to the issues they address.
There are several ways of doing this; perhaps the most straightforward
would be to base the categorization on the particular system.
A basic outline might look as follows:
1.
Electron
sources
2.
Positron
sources
2.1
Conventional
target sources
2.2
Undulator
sources
2.3
Other sources
3.
Damping rings
3.1
Lattice and
dynamics issues and alignment
3.2
Collective
limitations
3.3
Components
design (magnets, kickers, wigglers, RF etc.)
3.4
Novel designs
4.
Bunch
compressors
5.
Past, present
and future use of the ATF
6.
Diagnostics
6.1
Damping Ring
diagnostics
6.2
General
injection systems diagnostics
7.
Other issues
7.1
e-e- implications
Any scheme for organizing the sessions will need to be flexible. It is important to start out with some plan at the start of the workshop, but the timetable could change from day to day to suit the needs of the participants.
