Transcript The E951 Targetry Program Targetry Meeting CERN September 19, 2003 Harold G. Kirk Brookhaven National Laboratory.

The E951 Targetry Program
Targetry Meeting
CERN
September 19, 2003
Harold G. Kirk
Brookhaven National Laboratory
Interest in High-power Proton Drivers
High average power—SNS
 Thermal management
 Radiation damage
High peak power—NLC, Superbeams, NUFACT
 Thermal management
 Radiation damage
 Thermal shock
Harold G. Kirk
Superbeams
Carbon is a good target candidate
 Higher momentum pions
 Stationary target up to 1.5 MW
 Good thermal properties
 Low energy deposition
densities
28 GeV Proton Beam
Harold G. Kirk
Neutrino Factory
Maximize Pion/Muon Production
 Soft Pion Production
 Higher Z material
 High energy deposition
 Prone to target dissipation
 High Magnetic Field
Harold G. Kirk
High-Z Materials
Key Properties
Maximal soft-pion production
High pion absorption
High peak energy deposition
Potential for extension beyond 4 MW (liquids)
Key Issues
Jet dynamics in a high-field solenoid
Target disruption
Achievement of near-laminar flow for a 20 m/s jet
Harold G. Kirk
E951 Hg Jet Tests
• 1cm Diameter Hg Jet
• 24 GeV 4 TP Proton Beam
• No Magnetic Field
Harold G. Kirk
CERN/Grenoble Hg Jet Tests
• 4 mm Diameter Hg Jet
• v = 12 m/s
• 0, 10, 20T Magnetic Field
• No Proton Beam
A. Fabich, J. Lettry
Nufact’02
Harold G. Kirk
High Field Pulsed Solenoid




70o K Operation
15 T with 4.5 MW Pulsed Power
20 cm warm bore
1 m long beam pipe
Peter Titus, MIT
Harold G. Kirk
Pulsed Solenoid Performance
•5T Peak Field with 2 inner coils; 540 KVA ; 80O K
•10T Peak Field with 2 inner coils; 2.2 MVA PS; 72O K
•15T Peak Field with 3 coils; 2.2 MVA PS; 30O K
•15T Peak Field with 3 coils; 4.4 MVA PS; 70O K
Harold G. Kirk
Cryogenic Performance
BNL Pulsed Magnet LN2 Cooling
BNL Pulsed Magnet, LN2 Cooling - No Internal Flow
100
95
100
95
85
blktemp
outlet temp
80
75
70
Temperature K
temperature K
90
90
85
blktemp
outlet temp
80
75
70
65
65
60
0
60
0
200
400
600
800
1000
1200
500
1000
1500
2000
time (sec)
time (sec)
LN2 Forced Flow
LN2 Pool Boiling
Harold G. Kirk
Battery Power Supply R&D
Battery/Charger
12V 1400A
Mech. Switch
1500V 1600 A
Load
Mechanical Switch capable
of 4.4 MW Pulsed System
IGCT 600V 4000A
Harold G. Kirk
Future E951 Running
We plan to resume
E951 running at the
AGS.
But DOE HEP
support has been
terminated for FY03
and will likely
remain so for FY04
and FY05.
We need to explore
alternatives.
Harold G. Kirk
Alternative Running
Alternatives for targetry running:
BNL
AGS
Parameter
CERN
PS
JPARC
RCS
JPARC
MR
Proton Energy, GeV
24
24
3
50
p/bunch, 1012
8
4
40
40
p/cycle, 1012
70
30
80
300
Cycle length, ms
2.2
2.0
0.6
4.2
Availability (?)
07
06
08
09
Harold G. Kirk