X-Git-Url: http://git.uio.no/git/?a=blobdiff_plain;f=VZERO%2FAliVZEROCalibData.cxx;h=ec315e228182e8e2328c0a8cbb2049e72a5282b0;hb=222f9c453274e94711b82b98e9e856936fc3f52a;hp=b84c5c74daa8619feeb88be65b8730a657b317f1;hpb=ed1ea59f3ee2812594297bda3b0eadf33d13820d;p=u%2Fmrichter%2FAliRoot.git

diff --git a/VZERO/AliVZEROCalibData.cxx b/VZERO/AliVZEROCalibData.cxx
index b84c5c74daa..ec315e22818 100644
--- a/VZERO/AliVZEROCalibData.cxx
+++ b/VZERO/AliVZEROCalibData.cxx
@@ -331,6 +331,20 @@ Float_t AliVZEROCalibData::GetMIPperADC(Int_t channel) {
 	
 }
 
+//_____________________________________________________________________________
+Float_t AliVZEROCalibData::GetHV(Int_t channel, Float_t adcPerMip) {
+	
+  // Computes the HV value for certain ADC per MIP value
+  // Arguments passed is the PM number (aliroot numbering) and
+  // required value of ADC per MIP
+  if (!fPMGainsA) InitPMGains();
+
+  if (adcPerMip <= 0) return 0;
+  Float_t nPhPerMIP = (channel < 32) ? 6950 : 33690;
+  Float_t gain = adcPerMip/(nPhPerMIP*GetLightYields(channel)*0.18*TMath::Qe())*kChargePerADC;
+  return TMath::Exp((TMath::Log(gain)-fPMGainsA[channel])/fPMGainsB[channel]);
+}
+
 //________________________________________________________________
 Float_t AliVZEROCalibData::GetGain(Int_t channel)
 {