WBS 4 Solenoid Magnets Update Mu2e Working Group Meeting
27-Jul-2011 Thomas Page Solenoid Project Engineer
Slide 2
Outline Internal Design Review in May, 2011 Design status RLS
status CDR status 27-Jul-20112Mu2e WG Meeting
Slide 3
Internal Design Review Internal Design Review held May 3-5,
2011 Organized by Fermilab Directorate Review Committee: Pasquale
Fabricatore (INFN Genova) Joel Fuerst (ANL) Alain Herve (UWisc) Jim
Kerby (Fermilab) chair Herman ten Kate (CERN) Akira Yamamoto (KEK)
5 Recommendations and several findings 27-Jul-20113Mu2e WG
Meeting
Slide 4
Recommendations 1)Finalization of the conductor design,
qualification tests, and subsequent procurement should be the
highest priority of the solenoid effort. Response: Collaboration
with KEK, CERN (European); RFI for conductor. 2)The physics
simulation effort studying operation off the design point must
continue at a high priority. Results of these simulations will
provide important input to the magnet design margin, the system
design to include features to run off the design point, and
acceptance test planning. Response: Continued studies in progress.
3)Redesign the magnet systems using a lower and more typical value
for the peak voltage of 600V. Response: Peak voltages will be
reduced. 4)The 1.5K temperature margin for the solenoids should be
documented and closely guarded at this phase of the project. The
margin on the production solenoid should be increased. Response:
Design iteration with improved margin in progress. 5)A complete
R&D plan needs to be developed to answer open questions in a
timely manner. Coordination with CERN and KEK efforts may help
accelerate the program. Response: In progress. 27-Jul-20114Mu2e WG
Meeting
Slide 5
Conductor development is high priority, esp. for PS
(Recommendation 1). Short term plans: RFI to industry to get vendor
interest and feedback on conductor. Place an order for a short
length (~200-400 m) of each type of conductor (PS & DS).
Collaboration with KEK, European collaboration (Recommendation 5)
KEK has recently purchased similar cable so we are using this
experience as a guide. Cost and lead time will be similar. There is
a European collaboration with industry to build new ATLAS cable. We
will follow this collaboration and see how Mu2e can fit into this
collaboration. Conductor Development 27-Jul-20115Mu2e WG
Meeting
Slide 6
US Japan Agreement Development with Japanese industry of
prototype aluminum stabilized NbTi cable suitable for Comet or Mu2e
Two cables: 5 kA cable and 10 kA cable (~200 m each) 10 kA cable
will be made into a small COMET/Mu2e prototype coil by Japanese
industry Fermilab is upgrading its test capabilities to test large
aperture, conductively cooled solenoids o Facility would be used to
test TS modules. Mu2e WG Meeting627-Jul-2011
Slide 7
US Japan Agreement Schematic of the prototype coil which will
be made in Japanese industry. Mu2e WG Meeting727-Jul-2011
Slide 8
US Japan Agreement Studies of resistivity degradation as a
function of radiation dose. Results of radiation studies at
Japanese reactor show Damage to stabilizer is real effect Room
temperature anneal is effective in restoring RRR Vitaly Pronskikh
analysis supports the idea that we can run for ~1 year before
having an anneal o Based on our requirement of RRR degradation