mbhsp02 quench protection study
DESCRIPTION
MBHSP02 Quench Protection Study. April 16, 2013 FERMILAB. MBHSP02 voltage tap locations. MBHSP02 instrumentation. 2 protection heaters on the outer coil surface ~ 1100 mm long, 0.025 mm thick ( 21.5 mm wide in the mid-plane and 26 mm – in the pole area) stainless steel strips - PowerPoint PPT PresentationTRANSCRIPT
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MBHSP02 QUENCH PROTECTION STUDY
April 16, 2013FERMILAB
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MBHSP02 voltage tap locations
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MBHSP02 instrumentation
2 protection heaters on the outer coil surface ~1100 mm long, 0.025 mm thick (21.5 mm wide in the mid-plane and
26 mm – in the pole area) stainless steel strips Heater to coil insulation consists of one layer of Kapton (114 µm)
plus ~250 µm of glass
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26 mm
21.5 mm
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PH in MBHSP02
2 protection heaters on the same coil side connected in parallel to the same Heater Firing Unit (HFU)
HFU voltage of 400 V provides ~ 65 W/cm2 peak power density in MBHSP02 heaters
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Quench protection study: definitions
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Manual trip at different currents Dump delay 1000 ms Operation with one or two PH per coil
Current decay
HFU discharge
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Quench protection study
Minimum required PH peak power density to quench the magnet
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50-55 W/cm2
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PH delay in MBHSP01/02
50 W/cm2 peak power density in MBHSP02 and 25 W/cm2 in MBHSP01
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PH delay in the inner and outer coil layers
50 W/cm2 peak power density in MBHSP02
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Protection heater delay in the outer coil layer
Two PH (HFU1/2) vs. one PH (HFU2)
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Protection heater delay in the inner coil layer
Two PH (HFU1/2) vs. one PH (HFU2)
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Quench protection study
Quench propagation from OL to IL
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Quench integral study: One PH only Peak power density in PH was 50 W/cm2 at 4.5 K and 55 W/cm2 at
1.9 K
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Quench integral study: two PH Peak power density in PH was 50 W/cm2 at 4.5 K and 55 W/cm2 at
1.9 K
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More PH delay study
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Backup Slides
Guram Chlachidze, CERN-Fermilab internal review 15
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MBHSP01 vs. MBHSP02
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MBHSP02 Quench Training
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4.5 K 1.9 K 4.5 K