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Three modified CW bases are under investigation:

Three modified CW bases are under investigation: 1. HCAL version with modification ( HCALm ) C1=0,C2=0, C3=100pF, R3=62kOhm; 2. HCAL version with modification + additional wire to avoid parasitic capacitance ( HCALmw ); 3. ECAL version with modification ( ECALm ) C1=330pF, C2=47nF, C3=100pF,

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Three modified CW bases are under investigation:

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  1. Three modified CW bases are under investigation: 1. HCAL version with modification (HCALm) C1=0,C2=0, C3=100pF, R3=62kOhm; 2. HCAL version with modification + additional wire to avoid parasitic capacitance (HCALmw); 3. ECAL version with modification (ECALm) C1=330pF, C2=47nF, C3=100pF, R2=62kOhm.

  2. HCALm HCALmw oscillator OPamp output OPamp output OP output Pickup amplitude decreased by factor of 1.6 ECALm oscillator OP output

  3. Spike amplitude in OP output vs Uconrol for HCALm and HCALmw versions HCALm HCALmw OPamp output Ucontrol=1.0V, Ratio=1.56 Up-p=1.8V Up-p=2.8V Ucontrol=2.0V, Ratio=1.57 Up-p=2.8V Up-p=4.4V Ucontrol=3.0V, Ratio=1.62 Up-p=3.2V Up-p=5.2V

  4. Output HV vs LV and MV * Shift of HVoutput voltage was found only in the case of negative PS deviation.

  5. Reaction to the additional noise and signal injection to MV and CNTRL lines • 100 Ohm in serial to the MV line HCALmw ECALm oscillator Up-p=0.25V MV line Up-p=0.4V 2. Signal injection to MV line ECALm HCALmw Signal in MV line Signals in MV line (dark green) and OPamp output (blue) with synchronization from the internal 60kHz oscillator (green). ECALm • For both versions of CW no influence on the HVout value observed. • For the case of a current CW design HV in the output increased by 47 V!!!

  6. 100 Ohm serial in MV line HCALmw ECALm oscillator MV line Without 100Ohm Without 100Ohm OPamp output 60kHz signal injected into MV line oscillator OPamp output HCALmw version not sensitive to pickup noise in MV line 100Ohm in serial in MV line changed the shape and an amplitude in OPout

  7. Signal injection to a CNTRL line (low 5Hz frequency). HCALmw ECALm Injected signal U=50mV signal after the first 1MOhm resistor

  8. Signal injection to a CNTRL line (low frequency) for different C1 values in ECALm version of CW. ECALm version 330pF 200pF Injected signal Signal after the first 1.2MOhm resistor As smaller the value of C1, as longer the time of oscillations.

  9. Signal injection to a CNTRL line ( 60kHz frequency). ECALm HCALmw Synchronization with injected generator. oscillator Injected generator Signal after the first 1.2MOhm resistor Synchronization with internal oscillator. Synchronization only with the internal oscillator For both versions of CW no influence on the HVout value observed.

  10. Signal injection to a CNTRL line ( 60kHz frequency). ECALm HCALmw Synchronization with injected generator. oscillator Injected generator OPamp output Synchronization with internal oscillator. For both versions of CW no influence on the HVout value observed.

  11. Reaction to LV & MV turning on. HCALmw ECALm 6V OFF, 80V turning on Signals up to 50V in the input of OP 6V ON, 80V turning on

  12. Electronic noise. HCALm HCALmw HCALmw and ECALm have practically the same rms values(1.46,1.43), HCALm - a bit wider(1.56) ECALm

  13. New idea(Jacques): HCALm +C4(HCALmc) C4

  14. Output HV vs LV and MV For HCALmc version C4=47pF. * Shift of HVoutput voltage was found only in the case of negative PS deviation.

  15. HCALmc HCALmw For HCALmc version C4=47pF. oscillator OPamp output Up-p=2.8V Up-p=1.4V For HCALmc version Up-p of spikes has no dependence on Uconrol. Signal injection to a CNTRL line (low 5Hz frequency).

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