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 **
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