1 Superconducting Magnets for the MICE Channel Michael A. Green Oxford University Physics Department Oxford OX1-3RH, UK.

Slides:

Advertisements

Similar presentations

CM-22 Magnet Issues, 6 June MICE Magnet Cool Down and Other Issues Michael A. Green Lawrence Berkeley Laboratory Berkeley CA

Advertisements

10 June 2006MICE Collaboration Meeting CM-151 Can MICE Solid and Liquid Absorbers be Characterized to better than 0.3 Percent? Michael A. Green 1, and.

The Use of Small Coolers for Hydrogen and Helium Liquefaction

Zian Zhu Superconducting Solenoid Magnet BESIII Workshop Zian Zhu Beijing, Oct.13,2001.

1 Cooling the Hydrogen (Helium) Absorbers with Small Coolers Michael A. Green University of Oxford Department of Physics Oxford OX1 3RH, UK MICE Video.

MICE Superconducting Solenoids: Status and Update RAL: T W Bradshaw M Courthold J Rochford M Hills D Baynham Oxford: J Cobb W Lau S Yang MICE.

MUTAC Review, 9 April MuCOOL and MICE Coupling Magnet Status Michael A. Green Lawrence Berkeley Laboratory Berkeley CA

Magnet quench during a training run Magnet electrical circuit schematic PROGRESS ON THE MODELING AND MODIFICATION OF THE MICE SUPERCONDUCTING SPECTROMETER.

Trip Report on the visit to ICST of HIT, Harbin, China Derun Li Mike Green Steve Virostek Mike Zisman Lawrence Berkeley National Laboratory (from December.

Progress on the MICE Cooling Channel Solenoid Magnet System

The 23 rd MICE Collaboration Meeting -1- ICST/HIT Jan.13 to 17, Harbin/China Large Prototype Coil Test and Plan Fengyu Xu Institute of Cryogenics.

Changing the absorbers: how does it fit in the MICE experimental programme? Besides the requirement that the amount of multiple scattering material be.

Spectrometer Solenoid Design and Procurement Review Steve Virostek Mike Green Mike Zisman Lawrence Berkeley National Lab MICE Collaboration Meeting October.

23 October 2005MICE Meeting at RAL1 MICE Tracker Magnets, 4 K Coolers, and Magnet Coupling during a Quench Michael A. Green Lawrence Berkeley Laboratory.

1 Issues concerning the Design of the Tracker Solenoids Michael A. Green Lawrence Berkeley National Laboratory 17 August 2005.

1 Update on Focus Coil Design and Configuration M. A. Green, G. Barr, W. Lau, R. S. Senanayake, and S. Q. Yang University of Oxford Department of Physics.

1 Spectrometer Solenoid Design and Cost Update Michael A. Green Lawrence Berkeley Laboratory 10 February 2005.

MICE RF Module Safety Steve Virostek Lawrence Berkeley National Laboratory MICE Collaboration Meeting February 12, 2005.

10 October 2006 MICE CM-16 at RAL 1 Distributed versus Lumped Coupling Magnets Michael A. Green and Soren Prestemon Lawrence Berkeley Laboratory, Berkeley.

MICE Magnetic forces James Rochford Elwyn Baynham AFC working group meeting RAL 23 April 2004.

MICE AFCSWG Safety Review Summary Mary Anne Cummings Dec. 17, 2003 MICE Video Conference.

9 June 2006MICE CM-15 Fermilab1 Progress on the MICE Cooling Channel and Tracker Magnets since CM-14 Michael A. Green Lawrence Berkeley Laboratory.

1 The Genoa Tracker Solenoids and their Contribution toward a New Design Michael A. Green Lawrence Berkeley National Laboratory and Pasquale Fabbricatore.

1 Quench Protection and the Power Supplies for the MICE Focusing and Coupling Magnets Michael A Green Lawrence Berkley Laboratory 10 February 2005.

Μ-beam Absorber 1Absorber 2Absorber 3RF 1RF 2 Vacuum LH2 Warm window Windows in MICE: Option 1 (as currently designed) ISIS Safety officer’s comment: If.

11/26/2002Edgar L Black IIT MICE Video Conference November 27, 2002 Summary of safety implementation for proposal.

Talk outline 1 st talk: –Magnetic forces –Quench in the absorber cryostat 2 nd talk: –Shielding of magnetic fringe fields.

1 Infrastructure at RAL Iouri Ivaniouchenkov, RAL MICE Collaboration CERN, 29 March 2003.

LH2 Absorber Design Mary Anne Cummings MICE Safety Review LBL Dec 9, 2003.

1 Technical Arguments in Favor of using the Cryomech PT-415 Cooler for Cooling the LH 2 Experiment Michael A. Green Lawrence Berkeley Laboratory Berkeley.

Magnet and Absorber Heat Loads and Cooling with Various Small Coolers

12 March 2006NFMCC Meeting, IIT, Chicago1 Progress on the MICE Cooling Channel and Tracker Magnets Michael A. Green Lawrence Berkeley Laboratory.

CM-18 June Magnet Conductor Parameters and How They affect Conductor Selection for MICE Magnets Michael Green Lawrence Berkeley Laboratory Berkeley.

1 Progress on the MICE Cooling Channel Magnets Michael A. Green Lawrence Berkeley National Laboratory 28 June 2005.

MICE Hydrogen System Design Tom Bradshaw Iouri Ivaniouchenkov Elwyn Baynham Columbia Meeting June 2003.

MICE Collaboration Meeting CM-151 Is the the pulse tube cooler a must or is it simply better for the MICE AFC module? Michael A. Green Lawrence Berkeley.

Progress on the MuCool and MICE Coupling Coils * L. Wang a, X. K Liu a, F. Y. Xu a, A. B. Chen a, H. Pan a, H. Wu a, X. L. Guo a, S. X Zheng a, D. Summers.

Spectrometer Solenoid Update Steve Virostek Lawrence Berkeley National Lab Roy Preece Rutherford Appleton Lab October 28, 2011 MICE Collaboration Meeting.

Status and Integration of the Spectrometer Solenoid Magnets Steve Virostek Lawrence Berkeley National Lab MICE RAL June 15, 2007.

MTA Cryogenics: Where We Are The Work of Fermilab AD/Cryo Barry Norris, Christine Darve and a host of wonderfully talented Cryogenic Personnel John Thompson,

Magnet quench during a training run Successfully trained to peak currents and operationally tested Thermal performance requirements met 3D magnetic bore.

Spectrometer Solenoid Test Plan Workshop: Spectrometer Solenoid Overview Steve Virostek - LBNL February 17, 2012.

Hydrogen system R&D. R&D programme – general points Hydrogen absorber system incorporates 2 novel aspects Hydrogen storage using a hydride bed Hydrogen.

1 Layout and Installation MICE Collaboration Meeting, RAL, October 27-29, 2004 Elwyn Baynham, Tom Bradshaw, Paul Drumm, Matthew Hills, Yury Ivanyushenkov,

Some Thoughts on Magnetic Measurements for MICE Michael A. Green Lawrence Berkeley Laboratory Berkeley CA 94720, USA.

Safety Requirements and Regulations 10/3/20121Safety Requirements & Regulations James Sears.

Preliminary Design for the Coupling Coil Cryostat in MICE

Abstract: The Muon Ionization Cooling Experiment (MICE) is an international effort sited at Rutherford Appleton Laboratory, which will demonstrate ionization.

Spectrometer Solenoid Fabrication Status and Schedule Steve Virostek Lawrence Berkeley National Lab MICE RAL October 20, 2008.

MICE Cooling Channel Magnets: Spectrometer Solenoid Procurement RF Module Coupling Coil Proposal Steve Virostek Lawrence Berkeley National Lab NFMCC 07.

Magnet vacuum vessel w/radiation shield and cold mass in place Magnet leads (left) and the three cryocoolers on the top of the spectrometer solenoid service.

Spectrometer Solenoid Test Plan Workshop: Safety Considerations Steve Virostek - LBNL February 17, 2012.

MICE Coupling Coil Testing at Fermilab All Experimenters Meeting Ruben Carcagno March 19, R. Carcagno - MICE CC Testing at Fermilab3/19/2012.

MICE/MuCool Coupling Magnets to 22 ICST/HIT MICE/Muool Coupling Magnets Progress Li Wang for MICE Group Institute of Cryogenics.

22 October 2005MICE Meeting at RAL1 Tracker Solenoid Overview Michael A. Green Lawrence Berkeley Laboratory MICE Collaboration Meeting 22 October 2005.

9/17/07IRENG071 Cryogenic System for the ILC IR Magnets QD0 and QF1 K. C. Wu - BNL.

1 Small Coolers for MICE Michael A. Green University of Oxford Department of Physics Oxford OX1 3RH, UK MICE Collaboration Meeting RAL.

Cryogenic Summary - K. C. Wu Testing D2L102 in MAGCOOLJune, 02 Difference between D2L102 and D2L101 Operating Summary Cooldown to 100 K and 6 K Test Condition.

Date 2007/Sept./12-14 EDR kick-off-meeting Global Design Effort 1 Cryomodule Interface definition N. Ohuchi.

CLOSING REMARKS. Following the Review Charge Cryo-Design  Review and comment on the overall cooling circuit and overall cryo-design. u Temperature Margin.

MICE CC Magnet Cryostat Design Overview Derun Li Center for Beam Physics Lawrence Berkeley National Laboratory MICE CC Cryostat Design Review LBNL, February.

MICE Coupling Coil Vacuum Vessel Fabrication Update Allan DeMello Lawrence Berkeley National Laboratory Coupling Coil Working Group January 28, 2014 January.

Michael A. Green and Heng Pan

Cryogenic behavior of the cryogenic system

AEGIS Magnet System.

Spectrometer Solenoid Update

BDS Cryogenic System RDR Status and EDR Plans

Small Coolers for MICE MICE Collaboration Meeting RAL Michael A. Green

Mathew C. Wright October 2016

Cryogenic behavior of the magnet

Presentation transcript:

1 Superconducting Magnets for the MICE Channel Michael A. Green Oxford University Physics Department Oxford OX1-3RH, UK

2 The MICE channel is divided into seven modules. The MICE modules come in three types, the focusing and absorber module, the coupling and RF module, and the detector module. The focusing module contains two coils, which can create a either solenoid field or a gradient field. The coupling module contains one coil. Each detector module has two matching coils and three coils to create a uniform magnetic field. Location of the MICE Magnets

3 A 3 Dimensional View of the MICE Superconducting Coils Detector Center Coil Matching Coils Detector End Coils Coupling Coils Focusing Coils Matching Coils Detector End Coils Detector Center Coil Figure from J. H Rochford RAL

4 Separation of the Magnet Cryostat from the Rest of the Module The superconducting coils are vacuum insulated in their own vacuum vessel. This vessel is designed in accordance with the pressure vessel code. The magnet cryostat vacuum vessel is completely separated from any other vacuum vessel that is part of the module. The wall that separates the vacuum vessels must be leak tight to mbar liter s -1 in order to prevent gas migration between the vessels.

5 October 2003 Coupling Magnet Vacuum Space for RF Cavity Cryostat Vacuum

6 Focusing Module Magnet with a Hydrogen Absorber

7 Focus Magnet Cross-section

8 Focusing and Coupling Magnet Load Line

9 Detector Magnet Module Cryostat Vacuum Detector Vacuum

10 MICE Channel on Axis Field Profile Mice Channel Center Focus Coils Detector and Matching Coils Coupling Coil Baseline Case: 200 MeV/c, Beta = 43 cm in the flip mode

11 Magnet Power Supplies Each of the focus coils has its own leads so that the magnet can be changed from a gradient magnet to a straight solenoid magnet. The focusing magnets will be powered by a single 300 A, 10 V power supply. Each coupling coil will have a 10 V, 300 A power supply. The detector end and center coils will be hooked is series and powered by a single 300 A, 10 V power supply. End coil #1 will have a separate 100 A, 5 V power supply to adjust its current for tuning. Each of the matching coils will be in series with its corresponding coil in the other module. They will have 300 A, 10 V power supplies.

12 Magnet Quench Protection Each focus coil will be protected by a warm diode and resistor across its leads. The coupling coils will sub-divided into three parts. Each part will have a cold diode and resistor across that part. This quench protection scheme is commonly used in high field MRI magnets. The three detector coils in series will be protected by warm diodes and resistors across their leads. The matching coils will also be protected by a warm diodes and resistors. All of the magnets will be protected in part by heating due to currents flowing the magnet winding mandrel (quench back).

13 MICE Magnet Refrigeration The MICE magnet coil will be cooled by conduction from the winding mandrel and support structure. Cooling is from by two-phase 4.4 K helium flowing in tubes attached to these parts. About 70 W of 4.4 K refrigeration are needed to cool the seven magnet modules for MICE. Cooling for the magnet shields and leads comes from a 14 K helium circuit from the refrigerator.

14 Some MICE Magnet Safety Issues The coupling solenoid leads and the detector magnet leads are located outside of the hydrogen safety zone. Only the focusing magnet leads may be located within a hydrogen safety zone. Since the magnet are cooled by force helium in tubes, a magnet quench causes very little helium to be released and this release is outside of the MICE shielding. The cryostat vacuum vessels have relief devices that will open in the event of pressure buildup in the vacuum space. The handling of cryogenic fluids and cold transfer lines will be done by trained personnel using standard safety procedures for handling liquid helium prescribed by RAL.

15 Focusing Magnet and Hydrogen Safety Issues If possible, the leads and cables for the focusing solenoids will be located outside of the hydrogen safety zone. If the focusing coil leads and cables are within a hydrogen safety zone, they will have to be shielded using a cover of an inert gas such as argon. Sparking must not occur in a region where hydrogen gas can accumulate. Instrumentation wires for the focusing solenoids must be located outside of the hydrogen safety zone, if possible. A focusing magnet quench does not cause hydrogen venting.

16 Concluding Comments Each of the magnet modules has its own insulating vacuum vessel. The magnets do not share a common vacuum with any other components of MICE. The cryogenic system has a minimum amount of liquid helium within it. The magnet quench protection system will limit the voltages seen at the magnet leads to about 10 volts. Only the focusing magnets are in a hydrogen area. A quench of this magnet does not cause a general release of hydrogen. The major safety concern is the location of the magnet leads.