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σ = 1.73 σ = 2.01

σ = 4.90 σ = 21.1

CAEN OFF,HV cable unplugged from

the chamber

CAEN OFFHV cable plugged to the chamber

CAEN ON, HV off

CAEN ON, HV=0V,

No steel shielding on top of the CAEN

CAMBER M2R1_03, FEB13, channel 15working with CAEN HV system SY2527

Enormous

Enormous

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σ = 1.73

MATSUSADA OFF,HV cable unplugged from

the chamber

σ = 2.01

MATSUSADA OFF,HV cable plugged to

the chamber

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σ = 2.01

MATSUSADA On,HV on, 0V

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MATSUSADA On,MATSUSADA On,HV on, 2500VHV on, 2500V

σ = 2.01

CAMBER M2R1_03, FEB13, channel 15working with UF/PNPI HV system

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σ = 6.37

MATSUSADA On,HV on, 2500V

CHAMBER M2R1_03, FEB13, channel 15working with UF/PNPI HV system

In addition: CAEN power ON,In addition: CAEN power ON,

Conclusion: CAEN SY2527 (if ON) is a source of strong magnetic field.This field penetrates inside chamber and pickup noise voltage on the wire strips which have rather high impedance (100k//Cstrip), especially in M2M3R1.

Enormous