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Crab Cavity - Cryogenics -. KEKB Crab Cavity Group - presented by NAKAI Hirotaka. Overview. Crab cavity cryostat Calorimetric measurements Static heat loss of cryostat Unloaded Q-factor of crab cavity Cryogenic system monitoring. Crab Cavity Cryostat. Cryostat Design Concept. - PowerPoint PPT Presentation
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1HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION
KEKB Review Committee/20070319 NAKAI Hirotaka
KEKKEK
Crab Cavity- Cryogenics -Crab Cavity
- Cryogenics -
KEKB Crab Cavity Group
- presented by NAKAI Hirotaka
KEKB Crab Cavity Group
- presented by NAKAI Hirotaka
2HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION
KEKB Review Committee/20070319 NAKAI Hirotaka
KEKKEK OverviewOverview
Crab cavity cryostat
Calorimetric measurementsStatic heat loss of cryostat
Unloaded Q-factor of crab cavity
Cryogenic system monitoring
Crab cavity cryostat
Calorimetric measurementsStatic heat loss of cryostat
Unloaded Q-factor of crab cavity
Cryogenic system monitoring
3HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION
KEKB Review Committee/20070319 NAKAI Hirotaka
KEKKEK
Crab Cavity Cryostat Crab Cavity Cryostat
4HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION
KEKB Review Committee/20070319 NAKAI Hirotaka
KEKKEK Cryostat Design ConceptCryostat Design Concept
Jacket-type liquid helium vessels
Coaxial coupler with bellows for frequency tuning
Stub support for long coaxial coupler for mechanical support and cooling of coaxial coupler tip
Jacket-type liquid helium vessels
Coaxial coupler with bellows for frequency tuning
Stub support for long coaxial coupler for mechanical support and cooling of coaxial coupler tip
5HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION
KEKB Review Committee/20070319 NAKAI Hirotaka
KEKKEK Cryostat Conceptual DesignCryostat Conceptual Design
Top View RF Input couplerMagnetic Shield (Jacket Type)
80 K Liq. Nitrogen Shield
Coaxial Coupler
Stub Support
Bellows
Liq. HeRF MonitoringPort
Frequency Tuningby Adjusting Distance
Crab Mode Reject Filter(Notch Filter)
HOMAbsorber
I.D. 240 I.D.100
Liq. He
HOMAbsorber
6HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION
KEKB Review Committee/20070319 NAKAI Hirotaka
KEKKEK Schematic Drawing of CryostatSchematic Drawing of Cryostat
7HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION
KEKB Review Committee/20070319 NAKAI Hirotaka
KEKKEK HER Crab Cavity CryostatHER Crab Cavity Cryostat
8HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION
KEKB Review Committee/20070319 NAKAI Hirotaka
KEKKEK LER Crab Cavity CryostatLER Crab Cavity Cryostat
9HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION
KEKB Review Committee/20070319 NAKAI Hirotaka
KEKKEK
Calorimetric Measurements Calorimetric Measurements
10HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION
KEKB Review Committee/20070319 NAKAI Hirotaka
KEKKEK Heater in Helium JacketHeater in Helium Jacket
11HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION
KEKB Review Committee/20070319 NAKAI Hirotaka
KEKKEK Static Loss of CryostatStatic Loss of Cryostat
HER 20061117Heater [W]Duration [min.]Coupler [L/min.]Coax. [L/min.]Bellows [L/min.]Total [L/min.]Q-flow [W]Total Loss [W]Static Loss [W]
0 28 3 139.5 157.5 300 18.6720 20 3 137.5 157.5 298 18.54 50.00 31.4640 15 3 139.0 158.0 300 18.67 46.15 27.480 27 3 137.0 156.0 296 18.42
20 20 3 137.0 157.0 297 18.48 57.14 38.6640 15 3 138.5 158.5 300 18.67 50.00 31.33
Average 18.57 50.82 32.25
LER 20061223Heater [W]Duration [min.]Coupler [L/min.]Coax. [L/min.]Bellows [L/min.]Total [L/min.]Q-flow [W]Total Loss [W]Static Loss [W]
0 32 4 98.7 137.9 240.6 14.9720 21 4 99.5 142.0 245.5 15.28 38.18 22.9040 16 4 101.2 117.2 222.4 13.84 40.00 26.160 32 4 99.3 142.0 245.3 15.26
20 22 4 95.8 149.4 249.2 15.51 44.00 28.4940 16 4 96.5 125.0 225.5 14.03 40.00 25.97
Average 14.82 40.55 25.73
HER 20061117Heater [W]Duration [min.]Coupler [L/min.]Coax. [L/min.]Bellows [L/min.]Total [L/min.]Q-flow [W]Total Loss [W]Static Loss [W]
0 28 3 139.5 157.5 300 18.6720 20 3 137.5 157.5 298 18.54 50.00 31.4640 15 3 139.0 158.0 300 18.67 46.15 27.480 27 3 137.0 156.0 296 18.42
20 20 3 137.0 157.0 297 18.48 57.14 38.6640 15 3 138.5 158.5 300 18.67 50.00 31.33
Average 18.57 50.82 32.25
LER 20061223Heater [W]Duration [min.]Coupler [L/min.]Coax. [L/min.]Bellows [L/min.]Total [L/min.]Q-flow [W]Total Loss [W]Static Loss [W]
0 32 4 98.7 137.9 240.6 14.9720 21 4 99.5 142.0 245.5 15.28 38.18 22.9040 16 4 101.2 117.2 222.4 13.84 40.00 26.160 32 4 99.3 142.0 245.3 15.26
20 22 4 95.8 149.4 249.2 15.51 44.00 28.4940 16 4 96.5 125.0 225.5 14.03 40.00 25.97
Average 14.82 40.55 25.73
12HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION
KEKB Review Committee/20070319 NAKAI Hirotaka
KEKKEK Unloaded Q-Factors of HERUnloaded Q-Factors of HER
108
109
1010
0.0 0.5 1.0 1.5 2.0 2.5 3.0
HER
2006061420061115200611162006111720051220(Vertical Meas.)
Vkick
[MV]
Operation Voltage
108
109
1010
0.0 0.5 1.0 1.5 2.0 2.5 3.0
HER
2006061420061115200611162006111720051220(Vertical Meas.)
Vkick
[MV]
Operation Voltage
13HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION
KEKB Review Committee/20070319 NAKAI Hirotaka
KEKKEK Unloaded Q-Factors of LERUnloaded Q-Factors of LER
108
109
1010
0.0 0.5 1.0 1.5 2.0 2.5 3.0
LER
200612222006122320060113(Vertical Meas.)
Vkick
[MV]
Operation Voltage
108
109
1010
0.0 0.5 1.0 1.5 2.0 2.5 3.0
LER
200612222006122320060113(Vertical Meas.)
Vkick
[MV]
Operation Voltage
14HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION
KEKB Review Committee/20070319 NAKAI Hirotaka
KEKKEK
Monitoring Devices in Cryogenic System
Monitoring Devices in Cryogenic System
15HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION
KEKB Review Committee/20070319 NAKAI Hirotaka
KEKKEK Monitoring DevicesMonitoring Devices
ThermometersPlatinum-Cobalt alloy resistance thermometer (Pt-Co RTD) for liquid helium temperature
Copper-Constantan thermocouple for liquid nitrogen temperature
Superconducting liquid helium level sensor
Pressure transducer
Heater for heat load compensation
Vacuum gaugesCold cathode gauge (CCG)
Pirani gauge
ThermometersPlatinum-Cobalt alloy resistance thermometer (Pt-Co RTD) for liquid helium temperature
Copper-Constantan thermocouple for liquid nitrogen temperature
Superconducting liquid helium level sensor
Pressure transducer
Heater for heat load compensation
Vacuum gaugesCold cathode gauge (CCG)
Pirani gauge
16HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION
KEKB Review Committee/20070319 NAKAI Hirotaka
KEKKEK Devices in Helium JacketsDevices in Helium Jackets
Liquid HeliumLevel Sensor
Helium JacketPressure Transducer
Helium JacketHeater
Heater Temperature(Thermocouple)
Helium JacketHeater
Heater Temperature(Thermocouple)
Helium JacketTemperature (Pt-Co RTD)
Cavity Temperature(Pt-Co RTD)
Helium JacketTemperature (Pt-Co RTD)
17HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION
KEKB Review Committee/20070319 NAKAI Hirotaka
KEKKEK Devices in Vacuum VesselDevices in Vacuum Vessel
Small Beam PipeTemperature(Thermocouple)
Liquid Nitrogen Outlet Temperature(Thermocouple)
Liquid Nitrogen Inlet Temperature(Thermocouple)
Large Beam PipeTemperature(Thermocouple)
Coaxial Coupler Tubing Temperature(Pt-Co RTD)
Bellows TubingTemperature(Pt-Co RTD)
Input Coupler FlangeTemperature(Pt-Co RTD)
18HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION
KEKB Review Committee/20070319 NAKAI Hirotaka
KEKKEK Devices at External TubingDevices at External Tubing
Input Coupler Cooling Gas Temperature(Thermocouple)
Bellows Cooling Gas Temperature(Thermocouple)
Coaxial Coupler Cooling Gas Temperature(Thermocouple)
Safety ValveTemperature(Thermocouple)
Rapture ValveTemperature(Thermocouple)
19HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION
KEKB Review Committee/20070319 NAKAI Hirotaka
KEKKEK Display of Control SystemDisplay of Control System
20HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION
KEKB Review Committee/20070319 NAKAI Hirotaka
KEKKEK SummarySummary
Crab cavity cryostats manufactured successfully and connected to the refrigeration system
Calorimetric measurements carried outModerate heat load to cryostats
Cavity performance not so degraded during installation to the cryostat
Monitoring devices equipped and work properly
Crab cavity cryostats manufactured successfully and connected to the refrigeration system
Calorimetric measurements carried outModerate heat load to cryostats
Cavity performance not so degraded during installation to the cryostat
Monitoring devices equipped and work properly
