AIDA
GELINA
BRIKEN
nToF
CRIB
ISOLDE
CIRCE
nTOFCapture
DESPEC
DTAS
EDI_PSA
179Ta
CARME
StellarModelling
DCF
K40
AIDA
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Sat Mar 29 11:14:32 2025
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> BNC PB-4 - see attachment 1 > > Amplitude 35,000 > Attenuators all OUT > Risetime 50ns > Decay time 1ms > Tail pulse > Polarity + > Frequency 2Hz (min) > Delay min > > DSO ch#1 DC/1M - y: 5mV/div x: 100ns, 200ns, 1us, 2us & 10us/div - attachments 2-6 > > > > BNC PB-5 - see attachment 7-9 > > Amplitude 1.0V > Attenuation x1 > Decay time 1ms > Tail pulse > Polarity + > Frequency 2Hz (min) > Delay 250ns (min) > > DSO ch#1 DC/1M - y: 5mV/div x: 100ns, 200ns, 1us, 2us & 10us/div - attachments 10-14 > > > > BNC PB-5 - see attachment 15-16 > > Amplitude 10.0V > Attenuation x10 > Decay time 1ms > Tail pulse > Polarity + > Frequency 2Hz (min) > Delay 250ns (min) > > DSO ch#1 DC/1M - y: 5mV/div x: 100ns, 200ns, 1us, 2us & 10us/div - attachments 17-21 > > > > Conclusion > > BNC PB-5 significantly noisier than BNC PB-4. Results consistent with GSI tests https://elog.ph.ed.ac.uk/AIDA/886 , i.e. AIDA BNC PB-5 pulser at GSI *not* faulty. > BNC PB-5 operation with 10.0V/10x ( cf. 1.0V/x1 ) shows lower level of noise but still worse than BNC PB-4. > > 5mV transient at test input ( C_t = 0.7pF ) = 3.5fC = 80keV Si equivalent ( check 1V x 0.7pF = 0.7pC = 16MeV OK ).
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