1 st October 2008 Réunion sur la contribution exceptionnelle de la FrancePositron generation L....
-
Upload
noel-whitehead -
Category
Documents
-
view
220 -
download
0
Transcript of 1 st October 2008 Réunion sur la contribution exceptionnelle de la FrancePositron generation L....
C L I CC L I C
1st October 2008Réunion sur la contribution exceptionnelle de la France
Positron generation
Positron generation
L. Rinolfi (CERN)
Contribution exceptionnelle de la France
C L I CC L I C
1st October 2008Réunion sur la contribution exceptionnelle de la France
Positron generation
Thermoinic gunUnpolarized e-
LaserDC gunPolarized e-
Pre-injector Linac for e-
200 MeV
Pre-injector Linac for e+
200 MeV
Primary beam Linac for e-
5 GeV
Inje
ctor
Lin
ac
2.2
GeV
e+ DR
e+ PDR
2.424 GeV365 m
Boo
ster
Lin
ac
6.6
GeV 4 GHz
e+ BC1 e- BC1
e+ BC2 e- BC2e+ Main Linac e- Main Linac
12 GHz, 100 MV/m, 21 km 12 GHz, 100 MV/m, 21 km
2 GHz
e- DR
e- PDR
2 GHz 2 GHz 2 GHz
4 GHz 4 GHz
12 GHz 12 GHz
9 GeV48 km
561 m
234 m
2.424 GeV365 m
RTMLRTML
110 m 110 m
50 m 50 m
e-/Target
e
Target
AMD
2.424 GeV365 m
2.424 GeV365 m
The CLIC Injector complex in 2008
3 TeV
Base line configuration
C L I CC L I C
1st October 2008Réunion sur la contribution exceptionnelle de la France
Positron generation
Conventional e+ source based on channelling
A e- beam impinges on the crystal: - energy of 5 GeV - beam size of 2.5 mm
crystalamorphous
e-e-
e+
Yield: 0.9 e+ / e-
@ 200 MeV
•A crystal e+ source :• - a 1.4 mm thick W crystal oriented along <111> axis• - a 10 mm thick W amorphous disk
•Charged particles are swept off after the crystal:only (> 2MeV) impinge on the amorphous target.
e-
e+
R. Chehab, A. Variola, A. Vivoli / LAL, V.M.Strakhovenko / BINP - Novosibirsk
C L I CC L I C
1st October 2008Réunion sur la contribution exceptionnelle de la France
Positron generation
The CLIC Injector complex (Compton)
3 TeV
Laser Compton ring configuration
Laser
Laser
DC gunPolarized e-
Pre-injector Linac for e-
200 MeVe+ Target
Pre-injector Linac for e+
200 MeV
Inje
ctor
Lin
ac
2.2
GeV
e+ DR2.424 GeV
Boo
ster
Lin
ac
6.6
GeV 4 GHz
e+ BC1 e- BC1
e+ BC2 e- BC2e+ Main Linac e- Main Linac
2 GHz
e- DR
e- PDR
2 GHz 2 GHz
4 GHz 4 GHz
12 GHz 12 GHz
9 GeV48 km
e- Drive Linac 1.3 GeV
Compton ring
e+ PDR and Accumulator
ring
2 GHz
RF
gun
Stacking cavity
2.424 GeV2.424 GeV
2.424 GeV
C L I CC L I C
1st October 2008Réunion sur la contribution exceptionnelle de la France
Positron generation
Fabry-Perot cavity developed at LAL
C L I CC L I C
1st October 2008Réunion sur la contribution exceptionnelle de la France
Positron generation
Collaboration for laser developments
C L I CC L I C
1st October 2008Réunion sur la contribution exceptionnelle de la France
Positron generation
Tests at ATF / KEK
C L I CC L I C
1st October 2008Réunion sur la contribution exceptionnelle de la France
Positron generation
CERN/LAL collaboration studies on CLIC e+ sources
L. Rinolfi (CERN), A. Variola (LAL)
Document written in August, dated 2 September 2008
Sent to the CERN DG on 3 September 2008
C L I CC L I C
1st October 2008Réunion sur la contribution exceptionnelle de la France
Positron generation
Proposal for e+ source studies for the CLIC Base Line (unpolarized e+)
Proposal for e+ source studies for the CLIC Compton ring (polarized e+)
Two proposals with corresponding deliverables
Deliverables by LAL for the CLIC Base Line studies: 1) Detailed characteristics of the targets and the corresponding geometry. 2) Provides the Peak Energy Deposition Density (PEDD) for each target and the heating consequences and verifies the possible mechanical stresses. 3) Detailed beam characteristics at the end of the e+ Pre-Injector Linac (bunch charge, transverses and longitudinal emittances, energy, energy spread, bunch length, ....)
Deliverables by LAL for the CLIC Compton ring studies: 1) Study if the existing design of the optical/stacking cavity could be rescaled for CLIC requirements after ATF results. 2) Detailed laser characteristics corresponding to the proposed stacking cavity. 3) Characteristics of the photons flux with the corresponding geometry (distance, collimation,....). 4) Assuming that a single target will be used, detailed characteristics of the target. 5) Provides the PEDD and parameters related to thermal and mechanical effects. 6) Results of simulations optimized at 200 MeV showing detailed beam characteristics at the end of the e+ Pre-Injector Linac (bunch charge, transverses and longitudinal emittances, energy, energy spread, bunch length, …..). 7) Results of experimental tests at ATF for the optical cavity and the laser system.
C L I CC L I C
1st October 2008Réunion sur la contribution exceptionnelle de la France
Positron generation
Man power and Schedule
October 2008 to October 2010
Schedule: (assuming green light from CERN DG this month)