QD0 meeting 6-12-2013
-
Upload
claudia-gay -
Category
Documents
-
view
18 -
download
0
description
Transcript of QD0 meeting 6-12-2013
![Page 1: QD0 meeting 6-12-2013](https://reader036.fdocuments.us/reader036/viewer/2022082807/56812ce3550346895d91a9f5/html5/thumbnails/1.jpg)
QD0 meeting 6-12-2013
Lau Gatignon
![Page 2: QD0 meeting 6-12-2013](https://reader036.fdocuments.us/reader036/viewer/2022082807/56812ce3550346895d91a9f5/html5/thumbnails/2.jpg)
Topics
• Impressions from Tokyo• Topics for CLIC-ILC collaboration• Stabilisation news?• Prealignment news?• QD0 news?• CLIC note by Lawrence Deacon on new PCL• Muon sweeping: PhD study Belgin Piliçer with Helmut B.• MDI meeting on 17th of January in 112/R-028
Tokyo talksCamillo on QD0 stabilisation
![Page 3: QD0 meeting 6-12-2013](https://reader036.fdocuments.us/reader036/viewer/2022082807/56812ce3550346895d91a9f5/html5/thumbnails/3.jpg)
Permanent block solution
![Page 4: QD0 meeting 6-12-2013](https://reader036.fdocuments.us/reader036/viewer/2022082807/56812ce3550346895d91a9f5/html5/thumbnails/4.jpg)
Electromagnet solution
![Page 5: QD0 meeting 6-12-2013](https://reader036.fdocuments.us/reader036/viewer/2022082807/56812ce3550346895d91a9f5/html5/thumbnails/5.jpg)
Hybrid QD0• CLIC went for hybrid, warm technology.
Choice mainly driven by stabilization requirements.• This choice impacts on many aspects in MDI:
QD0 design itself
Anti-solenoid is imperative for PM protectionNo cryo-pumping ‘for free’Integration issues…….
• The s.c. magnet is more compact, the hybrid solution is easier to stabilize and align
• Michele Modena has had a first look at QD0 adaptation to ILC.→ See Michele’s presentation
• Many related aspects go well beyond QD0 itself and involve MDI.• Hybrid technology could also be an option at ATF2
![Page 6: QD0 meeting 6-12-2013](https://reader036.fdocuments.us/reader036/viewer/2022082807/56812ce3550346895d91a9f5/html5/thumbnails/6.jpg)
Pre-alignment
The pre-alignment approach in the MDI sector has been described before.
Helene Mainaud Durand will describe the CLIC approach for MDI and BDSin more detail on Thursday.
![Page 7: QD0 meeting 6-12-2013](https://reader036.fdocuments.us/reader036/viewer/2022082807/56812ce3550346895d91a9f5/html5/thumbnails/7.jpg)
Spent Beam
• Both in ILC and CLIC the spent beam must be transported away cleanly through the experiment onto the beam dumps.
• On the CLIC side a new design has been presented at the Hamburg workshop by Lawrence Deacon.This new design has many advantages w.r.t. the old one:
Magnet lifetimePower consumptionCost
It may be considered whether a similar design could be applied to ILC.
![Page 8: QD0 meeting 6-12-2013](https://reader036.fdocuments.us/reader036/viewer/2022082807/56812ce3550346895d91a9f5/html5/thumbnails/8.jpg)
Muon Sweeping• In ILC the muon sweeping is based on dipole magnets.
Need precise machiningBulkyCostlyEffect on main beam to be compensated (hence radiation)
• For CLIC we propose toroidal fieldsZero field on the beamTherefore weaker requirements on engineering precisionLess bulky, do not obstruct the tunnelCheaper
• Maybe a combination of the two can be consideredInitial sweeping with dipoles (both polarities present)Then toroids
![Page 9: QD0 meeting 6-12-2013](https://reader036.fdocuments.us/reader036/viewer/2022082807/56812ce3550346895d91a9f5/html5/thumbnails/9.jpg)
Gain factor 15 on muon flux.
Most of the surviving ones are created in the final dipole (via conversion of synchrotron photons). Maybe collimation of e± and g can help?