View
29
Download
0
Category
Preview:
DESCRIPTION
88 MHz RF STATUS. OUTLINE 1. Parameters of the 88 MHz RF in the muon cooling channel 2. Status of the high gradient test set-up 3. Preliminary parameters of an 88 MHz option for ICE. 1. Parameters the 88 MHz RF in the muon cooling channel. E 0 T= 4 MV/m = 159 ssolenoid: 40 x 20 cm - PowerPoint PPT Presentation
Citation preview
ICE workshop25-27/10/20011R. Garoby
88 MHz RF STATUS
OUTLINEOUTLINE
1. Parameters of the 88 MHz RF in the muon 1. Parameters of the 88 MHz RF in the muon cooling channelcooling channel
2. Status of the high gradient test set-up2. Status of the high gradient test set-up
3. Preliminary parameters of an 88 MHz option 3. Preliminary parameters of an 88 MHz option for ICEfor ICE
ICE workshop25-27/10/20012R. Garoby
1. Parameters the 88 MHz RF in the muon cooling channel
E0T = 4 MV/m = 159 s solenoid: 40 x 20 cmZTT = 7 M/m PPEAK = 2.04 MW/cavity Kilpatrick: 2.3R/Q = 144 PMEAN = 49 kW/cav. for 50 Hz repetition rate
beam tube 15 cm
90 cm unit length
84 cm
37 cm
beam axisconnection between units
SC solenoid SC solenoid
15 cm: mounting & solenoid supply
ICE workshop25-27/10/20013R. Garoby
22
02
.
20
,
TP
VTrr
f
Q
r
VP
wallS
cavSwall
r
Q
f
fTVP
cav
repmean
2203
volumelarge gap, large ,
CL
C
L
Q
r
andusing
Power efficiency optimization
ICE workshop25-27/10/20014R. Garoby
High gradient at low frequency
(Kilpatrick: 2.3) sparking: tests (high) magnetic field lines penetrating the
cavities multipactor: computations & tests large cavity dimensions mechanical
stability: computations field emission induced by lost particles
cavity test with beam.
Challenges:
ICE workshop25-27/10/20015R. Garoby
2. Status of the high gradient test set-up
Original system: PS 114 MHz RF cavity for leptons
ICE workshop25-27/10/20016R. Garoby
88 MHz test cavity(made from an 114 MHz structure)
Closed gap case
E0 = 4 MV/m
frep = 1 Hz
r/Q = 113 = 180 stpulse , frep = 1 ms, 1 Hz
Ppeak = 1.4 MW
Pmean = 1.4 kW
Kilp. = 2.3gap = 280 mmlength = 1 mdiameter= 1.77 m
Open gap case
E0 = 4 MV/m
frep = 1 Hz
r/Q = 107 = 180 stpulse , frep = 1 ms, 1 Hz
Ppeak = 1.5 MW
Pmean = 1.5 kW
Kilp. = 2.3gap = 260 mmlength = 1 mdiameter= 1.77 m
ICE workshop25-27/10/20017R. Garoby
2 MWamplifier
88 MHzcavity
NoseCone
(closed gap)
88 MHz test cavity(made from an 114 MHz structure)
ICE workshop25-27/10/20018R. Garoby
88 MHz test system status and planning
STATUS (October 2001)STATUS (October 2001) DEADLINEDEADLINE
Test place Test place infrastructureinfrastructure
In preparation [A. Marmillon]In preparation [A. Marmillon] 15/11/200115/11/2001
Power suppliesPower supplies Ordered [J.P. Royer]Ordered [J.P. Royer] 15/11/200115/11/2001
RF drivers (200 kW)RF drivers (200 kW) In preparation [D. Grier, C. Rossi]In preparation [D. Grier, C. Rossi] 1/12/20011/12/2001
RF amplifier (2 MW)RF amplifier (2 MW) In preparation [M. Vretenar]In preparation [M. Vretenar] 1/12/20011/12/2001
CavityCavity Ready (closed gap) [F. Gerigk]Ready (closed gap) [F. Gerigk] --
SolenoidsSolenoids In negociation with CEA (Saclay)In negociation with CEA (Saclay)
[J.M. Rey, A. Dael][J.M. Rey, A. Dael]
12/2002 ?12/2002 ?
SUMMARYFirst turn-on of the complete amplifier chain: 12/2001Setting-up on dummy load: 03/2002High gradient in the cavity: 05/2002Increase of RF power: 10/2002 ?Test with solenoid: 12/2002 ??
ICE workshop25-27/10/20019R. Garoby
3. Preliminary parameters of an 88 MHz option for ICE
Sketch of a 4 cavities module
ICE workshop25-27/10/200110R. Garoby
Repetition
rate Nb. of
cavities Peak RF
gradient
Peak RF power
Pulse duration
(RF/beam)
Mean RF
power
Power from mains
(= cooling needs) 4 14.4 MV 8.2 MW 0.6/0.1 ms 250 kW 0.5 MW
50 Hz 2 x 4 28.8 MV 16.4 MW 0.6/0.1 ms 500 kW 1 MW
4 14.4 MV 8.2 MW 1/0.5 ms 82 kW 0.17 MW 10 Hz
2 x 4 28.8 MV 16.4 MW 1/0.5 ms 164 kW 0.35 MW
Electrical power and cooling needs for the 88 MHz option in ICE
=> Advantage of the 10 Hz option
Overall needs in infrastructure: H. Ullrich
Recommended