I believe the missing tube is in RC2, not RC0. At least, that's
the tube that we removed several months ago -- the rearmost tube on the
bottom of the rearmost Cerenkov. That would be consistent with the lower
efficiency in RC2 compared to RC0 and 1 (aside from the fact that RC2 sees
more BLAST field than RC0 or RC1, so it SHOULD be less efficient until
shielding is added).
Karen
At 03:55 AM 3/1/2004 -0700, Eugene J. Geis wrote:
>Hello, Sorry to inundate all of you with excessive Cerenkov numbers.
>
>Latest results corroborate the initial results. These figures are from
>the most
>recent batch of Deuterium runs... fromt he day shielding was installed to this
>very morning. I have updated my cuts to include trigger TYPE 1
>Events. This is
>solely a coincidence of R/L sector TOFs... Unfortunately error bars in back
>angle CC's are still a little large... More data will obviously lower these.
>And you can be sure I'll throw more numbers at you when my error bars are
>smaller...
>
>**Total Sector efficiencies comprise cuts that require a negative charge
>hitting
>in ANY TOF from 0-10 with e'p Signatures, then taking these same events and
>seeing how many events have a hit in a CC on the same side. (#CC
>events)/(#electron in events in TOF 0-10) = Total sector efficiency.
>
>Attached are also postscript files of the ADC spectra of the CC's with NO
>Cuts,
>and then with the exact same cuts that produce these efficiencies... One can
>notice the much broader ADC spectrum of the Left sector... even though the
>right
>side still records higher efficiencies, now with R1 being our most
>reliable...
>Note: R0 is still missing one PMT. The slight discrepancy in events
>between the
>efficiency numbers below and the total events in the postscript plots is
>due to
>the runs being crunched while I am doing this analysis.
>
>CUTS: e'p reactions...
>-----------------------
>Must have a complete track, Tight vertex, Missing mass of the neutron,
>respective charges in opposite sectors, trigger = 1, middle TOF's behind
>each CC
>must have a hit corresponding to these tracks.
>
>The RUNS I've used
>--------------------------
>5028-5030 5038-5044 5046-5050 5069-5070 5072-5074 5077-5081 5084-5090
>5094-5098
>5099-5100 5102-5107 5125-5131 5141-5148 5157-5161 5165-5167 5169-5171
>5173-5175
>5176-5179 5180 5182-5189 5193-5199 5201-5204
>
>Many of the last row are not fully crunched but thanks to Chi's Magic, the
>events processed thus far are able to be included...
>
>*************************************************************
>Efficiencies Left Sector
>------------------------
>L0: 0.8607 +/- 0.0072 Total Hits: 19399
>L1: 0.8094 +/- 0.0150 Total Hits: 4449
>L2: 0.8505 +/- 0.0718 Total Hits: 194
>
>*************************************
>Efficiencies Right Sector
>------------------------
>R0: 0.9386 +/- 0.0074 Total Hits: 18292
>R1: 0.9535 +/- 0.0184 Total Hits: 2949
>R2: 0.7855 +/- 0.0588 Total Hits: 289
>
>
>*************************************
>Total Sector CC Efficiencies
>----------------------------
>
>Left Side: 0.8335 +/- 0.0045 Total Hits: 48757
>
>Right Side: 0.9233 +/- 0.0049 Total Hits: 41943
>*******************************************************
>
>
>
>
>
>
>
>
>
>Quoting "Eugene J. Geis" <egeis@imap2.asu.edu>:
>
> > Continued CC analysis after shielding... As mentioned in the earlier
> > email,
> > notice the fluctuation of L1, L2 and R1 and R2. These are the EXACT
> > SAME CUTS.
> >
> > By Monday all of these should be nailed down to within 1% or 2%...
> > But
> > again...
> > Left Sector shows clear improvement!!!!! Hopefully shielding will be put
> > into
> > the right side and push everything above 90% on the right!
> >
> > ***************************
> > Efficiencies Left Sector
> > ------------------------
> > L0: 0.8669 +/- 0.0132 Total Hits: 5756
> > L1: 0.8179 +/- 0.0261 Total Hits: 1472
> > L2: 0.8425 +/- 0.0887 Total Hits: 127
> >
> > ***************************
> > Efficiencies Right Sector
> > ------------------------
> > R0: 0.9298 +/- 0.0134 Total Hits: 5581
> > R1: 0.8043 +/- 0.0284 Total Hits: 1242
> > R2: 0.8268 +/- 0.0887 Total Hits: 127
> >
> > *****************************
> > Total Sector CC Efficiencies
> > ----------------------------
> >
> >
> > Left Side: 0.8414 +/- 0.0082 Total Hits: 15050
> >
> > Right Side: 0.8836 +/- 0.0086 Total Hits: 13579
> > *************************
> >
> >
> >
> > Quoting "Eugene J. Geis" <egeis@imap2.asu.edu>:
> >
> > > Dear fellow Blasters...
> > >
> > > Below are preliminary Efficiency results of the shielding in the
> > Left
> > > side. I've
> > > also included the right sector efficiencies as well. More
> > statistics
> > > are
> > > certainly needed as indicated by low # of events in back angle CC's
> > and
> > > from
> > > prior experience with the efficiencies of L1, L2, R1, and R2
> > > fluctuating
> > > considerably from run to run.
> > >
> > > But OVERALL... Left side looks astoundingly better. As mentioned by
> > a
> > > fellow
> > > devotee there is also a considerable increase in the efficiency of
> > the
> > > right
> > > side that is quite unexplainable. Results now follow:
> > >
> > > ====================================
> > > --- CC Efficiency ---
> > > ====================================
> > >
> > > !!!!!!!!!!!!!!!! BEFORE Shielding !!!!!!!!!!!!!!!!!!
> > >
> > > --------------------------------------------------
> > > Efficiencies BEFORE Shielding put into Left Sector
> > > --------------------------------------------------
> > >
> > > RUNS Used: 4871-4878 4880-4882 4883 4885-4892
> > > ---------- All Deuterium Runs
> > >
> > > -------------------------------------
> > > CUTS on Quasi-elastic e'p events
> > > -------------------------------------
> > >
> > > -Momentum of Electron abs(pwl-0.725)<0.13
> > > -Vertex
> > abs(zwl)<20.0&&abs(zwr)<20.0&&abs(zwl-zwr)<5.0
> > > -Charge qwl==-1&&qwr==1
> > > -No Cerenkov on Opposite Sector acr<0
> > > -Missing mass of Neutron abs("+mm_L+"-0.9)<0.35
> > > -Loose Phi Cut for noise abs(fwl-fwr+179.7)<30.0
> > >
> > >
> > > =====================================================
> > > -------------------- RESULTS --------------------
> > > =====================================================
> > >
> > > *************************
> > > Efficiencies Left Sector
> > > ------------------------
> > > L0: 0.7562 +/- 0.0190 Total Hits: 2777
> > > L1: 0.3028 +/- 0.0307 Total Hits: 1060
> > > L2: 0.5214 +/- 0.0845 Total Hits: 140
> > >
> > > **************************
> > > Efficiencies Right Sector
> > > -------------------------
> > > R0: 0.8604 +/- 0.0186 Total Hits: 2901
> > > R1: 0.5626 +/- 0.0276 Total Hits: 1310
> > > R2: 0.3729 +/- 0.0574 Total Hits: 303
> > >
> > >
> > > *************************************
> > > Total Sector CC Efficiencies
> > > ----------------------------
> > >
> > >
> > > Left Side: 0.6015 +/- 0.0113 Total Hits: 7851
> > >
> > > Right Side: 0.7150 +/- 0.0106 Total Hits: 8874
> > > *****************************************************
> > > =====================================================
> > > *****************************************************
> > > =====================================================
> > > *****************************************************
> > >
> > > !!!!!!!!!!!!!!!! AFTER Shielding !!!!!!!!!!!!!!!!!
> > >
> > > --------------------------------------------------
> > > Efficiencies AFTER Shielding put into Left Sector
> > > --------------------------------------------------
> > >
> > > RUNS Used: 5028-5030 5038-5044 5046-5050
> > > ---------- All Deuterium Runs
> > >
> > > -----------------------------------------------------
> > > CUTS on Quasi-elastic e'p events -SAME AS BEFORE...
> > > -----------------------------------------------------
> > >
> > > -Momentum of Electron abs(pwl-0.725)<0.13
> > > -Vertex abs(zwl)<20.0&&abs(zwr)<20.0&&abs(zwl-zwr)<5.0
> > > -Charge qwl==-1&&qwr==1
> > > -No Cerenkov on Opposite Sector acr<0
> > > -Missing mass of Neutron abs("+mm_L+"-0.9)<0.35
> > > -Loose Phi Cut for noise abs(fwl-fwr+179.7)<30.0
> > >
> > >
> > > =====================================================
> > > -------------------- RESULTS --------------------
> > > =====================================================
> > >
> > > *************************
> > > Efficiencies Left Sector
> > > ------------------------
> > > L0: 0.8400 +/- 0.0216 Total Hits: 2137
> > > L1: 0.7791 +/- 0.0546 Total Hits: 335
> > > L2: 0.8140 +/- 0.1525 Total Hits: 43
> > >
> > > **************************
> > > Efficiencies Right Sector
> > > -------------------------
> > > R0: 0.9326 +/- 0.0212 Total Hits: 2227
> > > R1: 0.9368 +/- 0.0629 Total Hits: 253
> > > R2: 0.7556 +/- 0.1491 Total Hits: 45
> > >
> > >
> > > ******************************
> > > Total Sector CC Efficiencies
> > > ------------------------------
> > >
> > > Left Side: 0.8253 +/- 0.0139 Total Hits: 5185
> > >
> > > Right Side: 0.9106 +/- 0.0141 Total Hits: 5047
> > > *****************************************************
> > >
> > >
> > >
> > >
> > >
> > --------------------------------------------------------------------------
> > > Eugene Geis
> > > PhD Student, Physics Department, ASU
> > > Research Affiliate, MIT-Bates Laboratory of Nuclear Science
> > > eugene.geis@asu.edu
> > >
> > --------------------------------------------------------------------------
> > > -------------------------------water is
> > > good------------------------------
> > >
> > --------------------------------------------------------------------------
> > > ** Check Out the Phatty Acidz @ http://www.phattyacidz.com
> > **
> >
> >
> >
> > --------------------------------------------------------------------------
> > Eugene Geis
> > PhD Student, Physics Department, ASU
> > Research Affiliate, MIT-Bates Laboratory of Nuclear Science
> > eugene.geis@asu.edu
> > --------------------------------------------------------------------------
> > -------------------------------water is
> > good------------------------------
> > --------------------------------------------------------------------------
> > ** Check Out the Phatty Acidz @ http://www.phattyacidz.com **
>
>
>
>--------------------------------------------------------------------------
>Eugene Geis
>PhD Student, Physics Department, ASU
>Research Affiliate, MIT-Bates Laboratory of Nuclear Science
>eugene.geis@asu.edu
>--------------------------------------------------------------------------
>-------------------------------water is good------------------------------
>--------------------------------------------------------------------------
> ** Check Out the Phatty Acidz @ http://www.phattyacidz.com **
>
>
This archive was generated by hypermail 2.1.2 : Mon Feb 24 2014 - 14:07:30 EST