Notes
Slide Show
Outline
1
H6 Measurements I
  • LEGENDA
  • 1kV:    High voltage at 1 kV
  • 1.5 kV:  High voltage at 1,5 kV
  • diam:    Beam diametrically
  • 2.5 mm: Plates distance 2.5mm (air)
  • Old:    Insulation problems (air)
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H6 Measurements II
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Louvain Measurements
  • GENERAL SETUP
  • Protons 60 MeV (fixed)
  • beam diameter: 8 cm (collimated, with Cu plate, up to 11 mm)
  • fluence: 5 106  - 5 108 protons/s/cm2
  • 3 channels to current source, ch4 to a IC
  • FIX MODE: 1 nA current (~5 Hz)
  • SCAN MODE: points at 1 mA, 0.5 mA, 0.1 mA, 1 μA, 10 nA, 100 pA, 30 pA
  • Sequence: SCAN no beam; FIX+SCAN at 5E6 p/cm2/s, 1E7 p/cm2/s and 5E8 p/cm2/s; SCAN no beam.
  • Diametrical beam, then trials with longitudinal and not collided beam.
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Louvain Results: Components
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AMPL FIX
6
Thermal Variation
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Louvain Results: IC
  • There is not a good linear correlation with the recorder intensity and the flux values, particularly for the 1E7 values.
  • What's more, we can see a general increasing of the values with the time. Activation of some chamber material?
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Remarks
  • Proposed actions
  • Improve collimator fixing.
  • Insert the alimentation measurements in the SW.
  • Better uncoupling of the channels to avoid crosstalks.
  • Resolve spikes problem from the source-switch.
  • Lessons learnt
  • Reproduce entire measurement set up in house (we lost a lot of time in Louvin trying to fix the collimator better)
  • Radiation could also force the component to extract current signal ( AMPL)
  • It is better to calibrate the amplifier gain after a warm up (channel 2 drift)


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