Some Result of HyCal
Resolution
Liyang Jiang
CIAE/UNCW
1
Energy Resolution of PWO
2
General Information
• Run: 4280;
• Crystal: centered on W2016 for 5 minute
deep statistics run;
• Hycal Calibration Constants: gain5_iter;
• Landau*Gaussian Fit.
3
Fitting Results (PWO)
Eg=5.47GeV
Eg=3.09GeV
Eg=4.76GeV
Eg=2.27GeV
4
E cluster (GeV)
Linearity of Ec at PWO
5
Sigma/E vs Eg at PWO

E
 p0 
p1
E

p2
E
6
Energy Resolution at Lead Glass
7
Information
• Run: 4279;
• Crystal: centered on G657 for 5 minute
deep statistics run;
• Hycal Calibration Constants: gain5_iter;
• Landau*Gaussian Fit.
8
Fitting Results (Glass)
Eg=5.47GeV
Eg=3.09GeV
Eg=4.76GeV
Eg=2.27GeV
9
E cluster (GeV)
Linearity of Ec at Glass
10
Sigma/E vs Eg at Glass

E
 p0 
p1
E

p2
E
11
Position Resolution at PWO
12
Gaussian Fit Results (PWO)
Eg=5.47GeV
X (cm)
Eg=3.09GeV
X (cm)
Eg=4.76GeV
X (cm)
Eg=2.27GeV
X (cm)
13
X (cm)
X VS E gamma (PWO)
14
X sigma VS E gamma (PWO)
  p0  p1
E

p2
E
15
Position Resolution at Glass
16
Gaussian Fit Results (Glass)
Eg=5.47GeV
Eg=3.09GeV
Eg=4.76GeV
Eg=2.27GeV
17
X (cm)
X VS E gamma (Glass)
-44.24
-44.26
-44.28
-44.3
-44.32
-44.34
-44.36
-44.38
-44.4
-44.42
y = -0.007x2 + 0.0962x - 44.589
R2 = 0.9861
2
2.5
3
3.5
4.5
4
E gamma (GeV)
5
5.5
6
18
X sigma VS E gamma (Glass)
  p0  p1
E

p2
E
19
Position Resolution at Different
Place
20
PWO Information
• Run: 5348 (Second Snake Scan)
• Scan from W1884 to W1851
21
Fitting Results
22
Sigma Y VS X (PWO)
0.39
Sigma Y (cm)
0.37
0.35
0.33
0.31
0.29
0.27
0.25
-5
-3
-1
1
3
5
X (cm)
23
24
Erratum in Logbook
Beam-on modular id of Run 4279
• Logbook, page 240, Run 4279: “Centered
on Glass 587 – deep statistics”;
• Online database, Run 4279: “Centered on
G657 for 5 minute deep statistics run”.
25
Erratum in Logbook
• Information from EPICS bank;
• Reconstructed X and Y position;
• Energy deposit in each modular.
26
Erratum in Logbook
Position info in EPICS bank
• In EPICS bank,
the value of
position is not
changed
through Run
4279.
– ptrans_x.RBV
=448.47 mm,
– ptrans_y.RBV
=257.37 mm.
27
Erratum in Logbook
Reconstructed position
X=-44.34 cm
Y=-25.53 cm
28
Erratum in Logbook
Mean Energy deposited in each
modular (T counter 30)
G595
G596
G597
G598
G599
1.515E-03
4.401E-03
6.869E-03
4.868E-03
1.817E-03
G625
G626
G627
G628
G629
3.884E-03
2.487E-02
7.279E-02
2.629E-02
5.202E-03
G655
G656
G657
G658
G659
6.400E-03
7.521E-02
2.590E+00
1.084E-01
8.046E-03
G685
G686
G687
G688
G689
5.443E-03
2.572E-02
1.057E-01
3.230E-02
6.081E-03
G715
G716
G717
G718
G719
1.868E-03
5.196E-03
8.647E-03
5.512E-03
1.831E-03
29
Erratum in Logbook
Conclusion
• The evidence listed above proved that in
Run 4279, the beam is hit on the modular
G657. The note about Run 4279 in the
logbook Page 240 “Centered on Glass
587 …” should be “Centered on Glass
657…”.
• NO Lead Glass modular numbered 587.
30