ELOG BRIKEN

AIDA GELINA BRIKEN nToF CRIB ISOLDE CIRCE nTOFCapture DESPEC DTAS EDI_PSA 179Ta CARME StellarModelling DCF K40

BRIKEN

Fields marked with * are required
Entry time:	Mon Mar 31 13:11:38 2025
Author*:
Subject*:
> Some info on ancillary detector signals > > Plastic veto detectors (Top and Botomm): > The dynode signal of the PMT is passed through an > ORTEC 474 TFA amplifier before going to the DACQ > TFA: Gain=6 x min(~x2), Tint=200ns,Tdif=100ns, NonInvert > DACQ channels: Top: V1A7C1, Bottom: V1A7C2 > Photo of the signals of both detectors attached > with 60Co source (with gain changed to 20 x max(~x12.5)) > 200ns wide 70mV high signal > > With this info a rough calibration was established: > for the 2V range an ADC unit is 2000mV/16384=0.122mV > the 70mV (~1MeV) correspond to 574 ADC units which > with the change of gain 62/20/12.5=0.048 > become 27.6 ADC units. We checked with Gasific > that roughly 1 ADC unit corresponds to 2 EFIR units > thus the calibration is 1/2/27.6=0.018 MeV/unit > NOTE: the calibration in online spectra taken > before noon Sunday 6 was wrong by a factor 2 > too large!!!! > > > Si detector (Top and Bottom halves): > Signal from preamplifier in the low gain mode for the measurement: > we see nothing on the scope with 60Co source. In the high gain mode > we saw the other day a negative 6microsec wide 1mV high > signal with a 60Co. > > AIDA plastic veto: > The signal from the PMT is going through a CAEN > shaping amplifier. The signal has a bipolar shape > with a rise time of 500ns a total width of 2microsec > and a height of 100mV (60Co) > > F11 ToF plastic (Left and Right): > The signals are processed in the same way that the > plastic veto detector with TFA using the same settings. > Polarity of the signal unknown. > Currently we see no signal seems its not connected. > We found later that the NIM crate where the > TFA were sitting was not on! > We just made a calibration with beam particles > LISE was used to estimate an energy loss of 65 MeV for the ions. Encoding*: HTML ELCode plain Suppress Email notification

Attachment 1:
Drop attachments here...

ELOG V3.1.4-unknown