Post on 23-Dec-2015
transcript
Vacuum and cryogenic systems in R5.2 for MICE
Presentation tothe MICE/ISIS Operations meeting on
16/03/2015
The Vacuum Group
• Hardware: Tom Weston (DL), Roy Preece (RAL), Mike Courthold (RAL), Mark Tucker (RAL)
• Controls: Ian Mullacrane (DL), John Webb (DL), Peter Owens (DL), Phil Warburton (DL)
• Integration into local EPICS: Pierrick Hanlet (LTV from FNAL)
• Integration with Hall services: Andy Nichols (RAL), Andy Gallagher (DL), and others
Overall description
• The turbomolecular pumps (TMPs) are as close as possible to each cryostat.
• The TMPs are outside the PRY, protected from magnetic fields.• The TMPs are backed by a shared backing manifold system.• DN100 (CF) pipework connect them with the cryostats.• The backing line pipework is DN100 (LF).• There are two backing pumps, one of which will be running
whilst the other is spare. Each pump contains a 500m3/hr ROOTS backed by an 80m3/hr dry iDQ pump.
• The vacuum system will be fully automated with in-built safety via interlocks.
The Vacuum System
Edwards iQ backing pumps, pipework towards cryostats, and the controls rack in the North-West corner of R5.2
Along the South side of the cryostats
The branch with gate-valve to the North side at the EMR/KL position.
The TMP rigs will be placed on the aluminium plates adjacent to the innermost PRY legs.
Model view of South side of cryostats
Jason Tarrant
Model view of North side of cryostats
Jason Tarrant
The TMP rigs and the controls rack have been tested together at Daresbury. The rigs are temporarily in the NW corner of Hall, ready for the system to be tested on the local EPICS controls software, before being placed in their correct positions: two along the South side
of cryostats; and one on the North side.
Cryogenics
Gantry for filling operations
Thanks to Jason Tarrant for these drawings and 3d view
ODH
• There will be an ODH system (supplied by Crowcon)
• Audible warning inside Hall• Warning lights at entrance to Hall• Required for filling operations with liquid N
and liquid He• Required for quenches (each SS contains 300
litres of liquid He, FC contains 20 litres)
Bank of cryocooler compressors
Decay Solenoid
Dates• 16/02/2015• 16/03 to 20/03/2015• 09/04/2015• 05/05 to 29/05
Tasks• Helium compressor (8000h) service• Linde refrigerator (8000h) service• Decay solenoid cold• Exchange and service scroll pumps
for vacuum.
Operations Schedule
Date
• 13/03• 10/04• 20/04 to 24/04• 24/04• 01/05• 05/05 to 15/05• 18/05• 21/05• 26/05• 01/06 to 07/06• 08/06
Operation• Begin pump-out of FC• Begin cool-down of FC• Repairs of SS current leads• Begin pump-out of SSs• FC at base temperature• Verify FC magnet operation• Begin FC training• Pre-cool SSs with liq. N• Cool SSs with liq. He• Verify SS magnet operation• Begin SS training
Liquid helium (maximal?) consumption
Dates• 15/04 to 30/04• 01/05 to 15/05• 16/05 to 31/05• 01/06 to 30/06• 01/07 to 31/07• 01/08 until May 2016
Quantities• 1,000 litres• 2,000 litres• 4,000 litres• 10,000 litres• 5,000 litres• 1,000 litres per quench