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UIUC, December 2-3, 2004

n-EDM Collaboration Meeting: Homework on HV and SQUID cost estimate Alex Sushkov and Dima Budker Berkeley. UIUC, December 2-3, 2004. High Voltage. The current design (from Jan Boissevain):. High Voltage.

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UIUC, December 2-3, 2004

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  1. n-EDM Collaboration Meeting:Homework on HV and SQUID cost estimateAlex Sushkov and Dima Budker Berkeley UIUC, December 2-3, 2004

  2. High Voltage • The current design (from Jan Boissevain):

  3. High Voltage • The estimate is facilitated by the fact that we have a 1-1 prototype that has actually been built • Josh Long has performed exquisite bookkeeping on all the cost details of the prototype • The bottom line estimate is $200k (with minimal contingencies) • Approximate breakdown: • Mechanical parts to support gain capacitor and HV electrodes $25k • Gain capacitor $40k • Gain-electrode charging assembly $40k • HV electrodes $25k • Penetrations (air-vacuum and vacuum-LHe) -- commercial $10k • Cables $10k • Kerr-effect HV monitoring $30k • Contingency (10%) $20k • The $200k need to be compared with $90k (prototype) and $370k (pre-proposal) Have we forgotten anything major?

  4. 3He Magnetometry • The current design (from Jan Boissevain):

  5. 3He Magnetometry • The original idea is to use SQUIDs. Atomic magnetometer is an alternative under development, but it is too early for a cost estimate  stick with SQUIDs for now • SQUID issues have been explored by the collaboration several years ago [M. A. Espy et al, IEEE Transactions on Applied Superconductivity 9(2), p.3696, 1999], but there is urgent need to revisit this for the new design • Some issues to think about: how will the SQUID superconducting loops affect the B-field homogeneity, will we need Niobium shielding, which is standard in commercial systems, … • According to Andrei Matlachov there are three possible designs: • flux transformer with a large pick-up loop, problems with microphonics • one-chip magnetometer • large-base gradiometer, base ~ 40 mm • High-quality SQUID equipment is available commercially: Supracon A.G., Jenna, Tristan Technologies, Star Cryoelectronics (Santa Fe, NM) • Dr. Robin Cantor (of Star Cryoelectronics) has obtained a DOE SBIR for developing SQUIDs for EDM-type applications • We have been in touch with Dr. Cantor and obtained detailed quotations for the SQUID systems in various configurations

  6. The SQUID system quotation “By the way, you may wish to consider our PFL-800 electronics for your application. This is a multichannel feedback loop that is more suitable for large channel count, dedicated installations. The PFL-100 is convenient when a variety of experiments are planned and the channels need to be moved around (connected to different cryostats, for example).” R. Cantor, Nov. 2004

  7. The SQUID system • The bottom line is $50k with 10% contingency • This is to be compared with $150k in the pre-proposal

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