MICE Coupling Coil Testing at Fermilab MICE Collaboration Meeting Ruben Carcagno March 15, R. Carcagno - MICE CC Testing at Fermilab3/15/2012

MICE CC Assembly 3/15/2012R. Carcagno - MICE CC Testing at Fermilab2 First Coupling Coil has been delivered to LBNL

MICE CC Assembly Preparation To be installed by LBNL: – Cooling Tubes – Coil Quench Protection system. Coil cannot be tested without cold diodes and cold resistors! – Mechanical Supports – Heater to induce quench – Instrumentation (Temperature sensors, voltage taps) 3/15/2012R. Carcagno - MICE CC Testing at Fermilab3

Fringe Magnetic Field at 210 A Peak Field: 7.5 T 600 Gauss at 3m (~10 ft.) 100 Gauss at 5 m (~16 ft.) 5 Gauss at 15 m (~ 50 ft.) 3/15/2012R. Carcagno - MICE CC Testing at Fermilab4

Test Cryostat 3/15/2012R. Carcagno - MICE CC Testing at Fermilab5 Built by Meyer Tool in 1997 for SMES, never used Recently transferred from NHMFL/FSU to Fermilab for this use Requires several modifications 11.8 ft. 10 ft.

Removing Background Coil at NHMFL Background coil was removed prior to shipping to Fermilab and it was disposed in Florida 3/15/2012R. Carcagno - MICE CC Testing at Fermilab6

Top Plate Existing top Plate has sufficient penetrations for helium supply, return, power leads, instrumentatio n ports, etc. 3/15/2012R. Carcagno - MICE CC Testing at Fermilab7

Cryostat Modifications Background coil already removed The Helium Vessel and vacuum vessel cover will be removed A Dished Head will be installed to make the top plate transition to the vacuum vessel wall Mechanical support for coil assembly 3/15/2012R. Carcagno - MICE CC Testing at Fermilab8

Insert Cold Mass will be supported from the top plate Lateral motion due to magnetic forces will be restrained by supports attached to a column bolted to the bottom of the cryostat Cold mass and column will be wrapped with MLI 3/15/2012R. Carcagno - MICE CC Testing at Fermilab9

Test Site: Central Helium Liquefier Locations considered: IB1, CDF, and CHL CHL (South Annex) was recommended Fermilab management directed AD and TD to proceed with CHL location recommendation on 1/17/2012 and make it a high priority 3/15/2012R. Carcagno - MICE CC Testing at Fermilab10

CHL Test Area Cryostat was already moved to CHL test area location Preliminary vacuum vessel leak check in progress Calculation of forces due to fringe magnetic field interaction with building ferromagnetic elements in progress (V. Kashikhin) 3/15/2012R. Carcagno - MICE CC Testing at Fermilab11

Platform, Staging Area Concept May not have time to deploy for first MICE CC test Alternative solutions considered: articulated boom, scissor lift 3/15/2012R. Carcagno - MICE CC Testing at Fermilab12

Cryogenic System A simple scheme is proposed based on supplying LHe to the test cryostat from a large CHL LHe dewar, and a heater to warm up all the return gas to room temperature The 10,000 Gallon LHe dewar will be refilled as needed by the CHL liquefier Controlled cooldown is accomplished by mixing of room temperature He gas with the LHe supply 3/15/2012R. Carcagno - MICE CC Testing at Fermilab13 Test Cryostat P&ID CHL Cryo Distribution

DAQ and Controls Based on proven technology used at the IB1 Magnet Test Facility A similar Voltage Taps DAQ system was fabricated by TD and is ready for shipment to support the MICE Spectrometer Solenoid testing at Wang NMR Additional functions will include test stand cryo controls, power supply controls, and DAQ of various sensors (temperature, pressure, level, etc) 3/15/2012R. Carcagno - MICE CC Testing at Fermilab14

DAQ Block Diagram Quench Detection Fast Loggers Slow Scan Personnel Interlocks Equipment Interlocks Power System Control Cryo Controls Data Archival E-Log 3/15/2012R. Carcagno - MICE CC Testing at Fermilab15

Test Operations Preliminary estimates indicate that it would take up to 2.5 hours to cryogenically recover from a quench (to be verified by LBNL thermal analysis) Given the high magnet inductance of 596 H, it would take ~ 4 hours to ramp to full current (210 A) We anticipate no more than one training quenches per day A full thermal cycle is included after the coil has trained to verify that the coil “remembers” its training There could be several training quenches for this coil (50 or more?), so we estimate a total test run duration of approximately 2 months There will be a total of 4 Coupling Coils to be tested in this facility (one for MTA, two for MICE, and one spare) 3/15/2012R. Carcagno - MICE CC Testing at Fermilab16

Project Responsibilities The following organizations are involved in the MICE CC Test Stand project: the Accelerator Physics Center (APC), Technical Division (TD), Accelerator Division (TD), and Lawrence Berkeley National Lab (LBNL) Scope and deliverables for each organization has been agreed Detailed scope and interface documents exists between TD and AD Detailed scope and interface documents with LBNL are in progress 3/15/2012R. Carcagno - MICE CC Testing at Fermilab17

FNAL/APC Fermilab’s Accelerator Physics Center (APC) sponsors this project, provides the funding, specifies the schedule and priorities, and facilitates coordination with Lawrence Berkeley National Lab and other institutions involved in the MICE experiment The first coil is intended to go to Fermilab’s Mucool Test Area (MTA) 3/15/2012R. Carcagno - MICE CC Testing at Fermilab18

LBNL Responsibilities Specify test requirements and provide test run plan documentation Prepare the CC assembly and deliver it to Fermilab ready for testing and installation in the test cryostat, including: – Cooling tubes and manifold – Coil quench protection system (cold diodes and resistors) – Coil assembly mechanical support system – Temperature sensors, voltage taps, and heater to initiate a quench – Drawings and documentation Deliver a 300 A power supply and energy absorption system LBNL is responsible for thermal and electrical analysis of the coil assembly, and for the performance of the coil’s cooling system and the passive coil quench protection system Test Support 3/15/2012R. Carcagno - MICE CC Testing at Fermilab19

FNAL/TD Responsibilities SMES cryostat modifications to accommodate the MICE CC assembly for conduction-cooled testing Current Leads and superconducting bus to coil Test cryostat cryogenic system and controls up to the coil cooling tubes supply and return connections – U-tubes, heater, valves, sensors, internal tubing, thermal intercepts, relief valves Not responsible for the coil conduction-cooled thermal performance (cooldown, steady state, quench recovery, warmup) Quench detection/protection for HTS leads and SC bus (NOT for the coil!) DAQ and Power Supply control systems Coil assembly installation and removal Test stand installation and commissioning Test Stand Operational Support 3/15/2012R. Carcagno - MICE CC Testing at Fermilab20

FNAL/AD Responsibilities Prepare CHL area for SMES cryostat installation CHL Cryogenic Distribution System – Liquid Helium transfer line, bayonet can, ambient temperature helium piping CHL Liquefier operations support during the test – Refill CHL LHe dewar as needed – Recover return ambient helium gas 3/15/2012R. Carcagno - MICE CC Testing at Fermilab21

Test Stand Technical Project Team Project Leader: Ruben Carcagno, TD-T&I Lead Engineers: – C. Sylvester, TD-T&I (Cryostat modifications, installation, and mechanical support) – R. Rabehl, TD-T&I (Test Cryostat Cryo System) – B. Soyars, AD-Cryo (CHL Cryo Distribution System) – D. Orris, TD-T&I (Quench Detection, DAQ, controls) Department Heads: – Jay Theilacker, AD-Cryo – Ruben Carcagno, TD-T&I LBNL Technical Point of Contact: Steve Virostek APC Management: Mark Palmer, Alan Bross, Steve Geer 3/15/2012R. Carcagno - MICE CC Testing at Fermilab22

Test Stand Project Risk Assessment This risk assessment does not include the MICE CC assembly, it is only for the test stand infrastructure From Fermilab’s Engineering Manual: 3/15/2012R. Carcagno - MICE CC Testing at Fermilab23 Engineering Chapter and Project threshold not exceeded: formal controls not required Will follow good documentation practices and reviews Most critical elements are schedule, complex interfaces, and resource availability – Must keep scope to a minimum and make design choices consistent with a fast-track schedule

Preliminary Cost Estimate 3/15/2012R. Carcagno - MICE CC Testing at Fermilab24 Direct Cost to setup test stand and test 1 st coil: ~ $1M Operating cost includes cost of He losses and Electricity Cost of CHL initial helium charge not included (recoverable) Operating CHL in “batch” mode would reduce operating cost

Preliminary Schedule Attempts to meet MICE urgent programmatic needs Cryostat pacing item: dished head assembly (at least 14 weeks) Needs at least six weeks to install coil after LBNL delivers to FNAL – Coil must be delivered to Fermilab by end of April 2012 at the latest Assumes availability of skilled resources (4 FTEs in 6 months!) This schedule will be very tough to meet! 3/15/2012R. Carcagno - MICE CC Testing at Fermilab25

Summary All elements are in place to proceed with a MICE CC Test Stand installation at CHL. Detailed design in progress, and procurement of long lead items started. No technical issues: technology well understood and based on prior experience Critical project elements: tight schedule, complex interfaces, and availability of skilled people – Must be given very high priority at LBNL, FNAL/AD, and FNAL/TD – Must make sure scope is kept to a minimum – Still, schedule is very optimistic! 3/15/2012R. Carcagno - MICE CC Testing at Fermilab26