Transcript LH2 program at MTA 1. Review of the KEK test 2. Plan for 2005

LH2 program at MTA
1. Review of the KEK test
2. Plan for 2005
MTA
The MTA is focus and locus of Mucool activity
In 2005:
LH2 Absorber tests
RF testing (805 and 201 MHz)
Continue/finish cryo-Infrastructure
High pressure H2 gas absorbers
Linac Beam construction
The interim cooling system
H2 Buffer Tank
H2 Manifold Room
LH2 gas house
L-He Dewar, Transfer line, Valve box
KEK absorber test at MTA /FNAL
Complete controls system
KEK absorber II
PtCo #1 - #8
G-He Heater
KEK Absorber
PtCo He-IN
PtCo
W-He-OUT
(center)
PtCo W-He-OUT
(bottom)
Electronics upgrades:
• LH2 level sensor
•] New temp probes
• Temp probes inside He lines
First KEK test summary
1. Cold-He Cooling test has been started, and many problems
encountered/successfully solved.
2. Large heat input ~23 W to ~20 m transfer tube made thermal
vibration.  Solved by cold G-He system
3. High temperature G-He was sent to absorber when Dewar
was changed.  2 Dewars (500 L) were used simultaneously.
4. The absorber was filled of L-H2 full without leak, and it was
well controlled continuously without heat input.
5. The FNAL cryo-group is now operating the absorber with GHe heater.
6. Preliminary heat deposition test looked promising
½ fill on Jul-9 ; no leak at 20K
First data from MTA KEK absorber test
Data on July 27
KEK Absorber
July 15, 2004
22.5
22.0
July 15, ~20W heat
deposition, stable
temps
Temperature [K]
21.5
Z:MCT109
Z:MCT106
Z:MCT113
Z:MCFT47
Z:MCT108
Z:MCT111
Z:MCT110
Z:MCT107
Z:MCT112
Tsat
20
Temp probe readings
18
21.0
16
20.5
14
20.0
12
19.5
10
19.0
8
Warm He flow
18.5
6
18.0
4
17.5
2
17.0
12:00
Heater Flow Rate [l/m]
Goal: more heat absorption
with stable operation
22
0
13:00
Distribution of
temp. probes
(central tubes introduce
new artifice!)
Temperature uniformity…
LH2 R & D FY 2005
 Second KEK test (upgraded instrumentation) Next test:
1. New absorber instrumentation:
1.Temp probes (UIUC)
2.Internal temp. probes for He lines
3.Level censors
2. Shorter transfer line – install lift into the access pit for dewars
 Physics issues:
 Stable and expeditious cooldown
 Temperature stability and uniformity
 Heat absorption:
• Better handles on heat exchange efficiency
• Possibly run without central tubes..
 Next R & D Focus
 What is the next hurdle?
 What can be best done given time/money/resource/other
project constraints at MTA?
After the KEK Test…
 2005 realities:
 Most likely no completed cryo plant by year’s end
 Force flow test even less likely
• We have no engineer
• Have not completed non-cryo flow tests
 GH2 and RF tests are competing priorities
 Safety constraints are severe
• H2 zone is entire MTA
 So, a possible 2005 R & D program:
 Convective absorber run with RF
• Major safety review
 First low-intensity beam test with convective absorber
• Coordination with GH tests
 Cryo-cooler test
 Hydride bed test
Absorber R&D
 Two LH2 absorber designs are being studied
 Handle the power load differently
Convection-cooled. Has
internal heat
exchanger (LHe) and
heater – KEK System
Forced-Flow with external cooling loop
Forced-Flow Absorber
 Heat removed with
external heat exchanger
 LH2 pumped from
absorber to heat
exchanger
 Nozzles in flow path
establish turbulent flow
 Simulation via 2D and 3D
FEA