tevatron tunnel
TRANSCRIPT
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F e r m
i N a t i o n a
l A c c e l e r a t o r L a b o r a
t o r y
F e r m i N a t i o n a
l A c c e l e r a t o r L a b o r a
t o r y
C r y o
g e n i c D e p
a r t m e n t
C r y o g e n i c D e p
a r t m e n t
DOE Review of Tevatron Operations, March 21, 2006DOE Review of Tevatron Operations, March 21, 2006
Tevatron TunnelTevatron Tunnel
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F e r m i N a t i o n a
l A c c e l e r a t o r L a b o r a
t o r y
F e r m i N a t i o n a
l A c c e l e r a
t o r L a b o r a
t o r y
C r y o g e n i c D e p
a r t m e n t
C r y o g e n i c D e p
a r t m e n t
DOE Review of Tevatron Operations, March 21, 2006DOE Review of Tevatron Operations, March 21, 2006
Tevatron Dipole Cross SectionTevatron Dipole Cross Section
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F e r m i N a t i o n a
l A c c e l e r a t o r L a b o r a
t o r y
F e r m i N a t i o n a
l A c c e l e r a
t o r L a b o r a
t o r y
C r y o g e n i c D e p
a r t m e n t
C r y o g e n i c D e p
a r t m e n t
DOE Review of Tevatron Operations, March 21, 2006DOE Review of Tevatron Operations, March 21, 2006
Tevatron Satellite RefrigeratorTevatron Satellite Refrigerator
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F e r m i N a t i o n a
l A c c e l e r a t o r L a b o r a
t o r y
F e r m i N a t i o n a
l A c c e l e r a
t o r L a b o r a
t o r y
C r y o g e n i c D e p
a r t m e n t
C r y o g e n i c D e p
a r t m e n t
DOE Review of Tevatron Operations, March 21, 2006DOE Review of Tevatron Operations, March 21, 2006
Progression of Cryogenic DesignProgression of Cryogenic Design
1. Tunnel geometry
2. Warm iron magnet design
3. High heat load and pressure drop
4. Distribute refrigeration over short distances
5. 24 distributed 1 kW satellite refrigerators
6. Reciprocating expanders
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F e r m i N a t i o n a
l A c c e l e r a t o r L a b o r a
t o r y
F e r m i N a t i o n a
l A c c e l e r a
t o r L a b o r a
t o r y
C r y o g e n i c D e p
a r t m e n t
C r y o g e n i c D e p
a r t m e n t
DOE Review of Tevatron Operations, March 21, 2006DOE Review of Tevatron Operations, March 21, 2006
2005 Labor Usage (FTE)2005 Labor Usage (FTE)
56.0Total
4.0 Administration
8.0Paid Time Off
Other
2.5MuCool
0.1PD
9.5SRF
0.1 A0 Photoinjector
7.8Run II
Projects
9.0Maintenance
15.0Operations
Tevatron
2005 Labor Usage
Cryogenic Department
56.0Total
4.0 Administration
8.0Paid Time Off
Other
2.5MuCool
0.1PD
9.5SRF
0.1 A0 Photoinjector
7.8Run II
Projects
9.0Maintenance
15.0Operations
Tevatron
2005 Labor Usage
Cryogenic Department
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F e r m i N a t i o n a
l A c c e l e r a
t o r L a b o r a
t o r y
F e r m i N a t i o n a
l A c c e l e r a
t o r L a b o r a
t o r y
C r y o g e n i c D e p
a r t m e n t
C r y o g e n i c D e p
a r t m e n t
DOE Review of Tevatron Operations, March 21, 2006DOE Review of Tevatron Operations, March 21, 2006
Comparison of Cryogenic OperationsComparison of Cryogenic Operationsin Large Acceleratorsin Large Accelerators
CEBAF1 RHIC2,3 HERA1 Tevatron2
Operators (Lab) 1 11 11 13
Operators (Contractor) 0 0 7 0
Operations Support Staff 1 3 1 2
Number of Refrigerators 3 1 3 25
Notes:
1. Data from 1996
2. Data from 20053. Cryogenic system originally designed for ISABELLE and CBA
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F e r m i N a t i o n a
l A c c e l e r a
t o r L a b o r a
t o r y
F e r m i N a t i o n a
l A c c e l e r a
t o r L a b o r a
t o r y
C r y o g e n i c D e p
a r t m e n t
C r y o g e n i c D e p
a r t m e n t
DOE Review of Tevatron Operations, March 21, 2006DOE Review of Tevatron Operations, March 21, 2006
Comparison of Helium Losses in LargeComparison of Helium Losses in LargeAcceleratorsAccelerators
CEBAF1 RHIC2,3 HERA1 Tevatron2
Number of Refrigerators 3 1 3 25
Recover Quench Gas NA Yes Yes No
Losses (scf/day) 11,700 12,000 2,800 30,000
Losses per Refrigerator
(scf/day)
3,900 12,000 933 1,200
Sensitivity to power
outage < 1 hour
Low Medium Medium Very high
Notes:
scf = standard cubic feet
1. Data from 1996
2. Data from 2005
3. Cryogenic system originally designed for ISABELLE and CBA