1 / 16

FP420 Low and high voltage supply

FP420 Low and high voltage supply. Henning.E.Larsen@gmail.com INFN/Univ. of Torino July. 2008. A presentation intended to stimulate the discussion on which solution is best. 1). 2). 3). 1) All in tunnel -- CAEN. A3009, A3486, A3540, A3801 tested up to 140-150 Gy. A3501 never tested.

beck-weiss
Download Presentation

FP420 Low and high voltage supply

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. FP420Low and high voltage supply Henning.E.Larsen@gmail.com INFN/Univ. of Torino July. 2008 A presentation intended to stimulate the discussion on which solution is best

  2. 1) 2) 3)

  3. 1) All in tunnel -- CAEN • A3009, A3486, A3540, A3801 tested up to 140-150 Gy. A3501 never tested. • 500 m cable too long for CAN protocol, modification of hw necessary

  4. 1) Tunnel/counting room -- Wiener MPOD LV next to cryostat MPOD HV in counting room MPODs never radiation tested – Wiener optimistic and willing to test Maraton LV next to cryostat MPOD HV in counting room Customisation of Maraton necessary (low currents) Maraton tested up to 700 Gy, but limited Remore control

  5. 2) Alcoves/counting room -- Wiener Customisation of Maraton necessary (low currents)

  6. 3) Counting room Wide choice of supplies, lower cost, easier maintenance. High cable cost, need local rad-hard regulators

  7. 1) 2) 3)

  8. Recommendation • Recommend the solution with all but linear regulators in the counting room. Thus having 500m supply cables and linear regulators next to the front-end • Linear rad-hard regulators available from Cern stores for 2V, 3.3V and +5V supplies • Solution for +-12V for Gastof/QUARTIC is being investigated

  9. All supplies in counting room:Advantages/disadvantages • Best access • Most reliable • No radiation to sensitive electronics • Uses standard non rad-tol. power modules • cheaper, spares readily available • Large cable cost • Difficult to test as the EMC environment is hard to predict • Custom design and test of linear regulator board • No remote adjustment of low-voltages

  10. Local linear regulator to stabilize load voltage • Monitor of load current by the power supply • Monitor of the load voltage by sense wires and separate adc • No remote adjustment of load voltage! • Is that a serious problem?

  11. Cable bundle, one station = two pockets+Quartic/Gastof

  12. Quartic/Gastof regulators for +-12V • Radhard LHC4913/7913 from Cern stores not suitable for +-12V • Intersil HS-117, +12V 1.2A • Constructed with the Intersil dielectrically isolated Rad Hard Silicon Gate (RSG) process • rad-hard to 3kGy, latch-up immune • Test report: http://www.intersil.com/military/HS-117RH_SEE_Test_Report.pdf • Still missing -12V candidate devices

  13. Test of solution 3) • Goal: • Setup to validate supply over 500m. This requires construction of a PCB with a couple of LHC4913/7913 regulators. • I assume we can • borrow the necessary power supplies from either wiener or caen. • use the same cable to evaluate the temperature monitor system, but again we need to borrow the module from CAEN/Wiener • use the same cable to test HV supply for Si tracker but not for Quartic/Gastof. • Ideally we should also test the rad-hard version of +-12V regulators for quartic/gastof but I guess it may be hard to get samples , otherwise we can use the non-rad hard equivalents. • Still lacking a design for -12V Q/G supply. • I don’t foresee test of Q/G HV setup. For that we would need to buy HV cable (HTC-50-2, 1300€) as we cant use the NG28

  14. Reserve

  15. Power Supplies: requirements LV HV No. of channels Power budget

  16. Power Supplies In tunnel, under magnets: O(10) Gy/year 0.1 SEU/day/module In alcoves at 200 m from IP: 0.05-0.36 Gy/year

More Related