From: Flemming Videbaek (videbaek@sgs1.hirg.bnl.gov)
Date: Wed Feb 12 2003 - 23:15:41 EST
Just one comment from Colorado, The tubes for H1, abnd H2 and highly non-linear so having the 2. peak at 1.7 is not so unreasonable. Aren't you far away from the gap which usual starts at ch 3500 while the 1 MIP is at ~1000. PS I could not see the plot from here, with the settings via the phone line ------------------------------------------------------ Flemming Videbaek Physics Department Brookhaven National Laboratory tlf: 631-344-4106 fax 631-344-1334 e-mail: videbaek@bnl.gov ----- Original Message ----- From: "Djamel Ouerdane" <ouerdane@nbi.dk> To: <brahms-dev-l@bnl.gov> Sent: Wednesday, February 12, 2003 10:14 PM Subject: Re: weird TOF stuff | There's at least one thing I understand better. I simply forgot that the | ADC gap was not calibrated for the TOF ADCs. When the ADC digits are | normalized to the MIP ADC mean, the ADC gaps from tube to tube don't match | due to different gains. That's why they are not visible in the plots I put | on the web (all slats). So the large dE particles are in fact not so large | (gaps converted in dE can be big). | | But the two band structure is still there for each slat. I tried to | correlate beta with dE_bot and dE_top exclusively, still the same. | | I'll look at it more tomorrow, it's late. | | Djam | | | -- | Djamel Ouerdane ------------------------------------------o | | Niels Bohr Institute | Home: | | | Blegdamsvej 17, DK-2100 Ø | Jagtvej 141 2D, | | | Fax: +45 35 32 50 16 | DK-2200 Copenhagen N | | | Tel: +45 35 32 52 69 | +45 35 86 19 74 | | | http://www.nbi.dk/~ouerdane | | | ouerdane@nbi.dk | | o---------------------------------------------------------o | |
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