1. LEPS experiment from 2008.Jan to 2009.Jul
using the new TPC and new liquid cryo-target system
2008.Jan-Jul: 257nm laser, LH2 tagger rate ~2x105 /s
2008.Oct-Nov: 355nm laser, LD2 tagger rate ~1x106 /s
Speed up DAQ by decentralizing the TPC sense-wire readout
and modifying the program. Trigger: sideway + forward
2008.Dec, 2009Feb,Jul: 355nm laser, LH2 : confirm the old TPC data,
calibration, etc.
2009.Mar-Jul: 355nm laser, LHe : search for the Q+ hypernuclei
2.96 GeV g
LH2
~8x1011
photons
(~ old TPC run)
2.4 GeV g
LD2
~1.6x1012
photons
~2.0x1012 photons
~4.6x1012 photons

2. 2008B-2009A：主な trouble & setting 変更
10/2: TPC FADC配線変更　（高速化）, プログラム修正
10/9-10/11: LD2, trigger#23(TPC) [DC2Uに歯抜け not for analysis]
10/11: DC2U PA交換、TagPL hrtdc用delay 一部変更
10/12-10/16: LD2, trigger#23
10/16: replace AC（1.0081.03), set ee-veto scinti add STD trigger
10/16-10/28, 11/13-11/29: LD2, trigger#24(TPC+STD)
11/17-12/7: LH2, trigger#24
12/7: DC1U trip [12/7-12/12: DC1U無しのデータ　 not for analysis]
1月～2/4: DC1修理、TOF研磨、AC交換（2枚3枚）
2/4: setting&alignment(DC1,solenoid(TPC)+NDC,FWD,TOF)
2/7-2/8: LH2, trigger#24
2/8: Solenoid OFF [2/8-2/13 solenoid 磁場無しのデータ　 not for analysis]
2/13: solenoid temperature was recovered  solenoid ON
2/13-21: LH2, trigger#24
2/21: A wire of DC1V was broken (2/24,25 修理)

3. 2008B-2009A：主な trouble & setting 変更
3/2: setting & alignment (DC1,solenoid(TPC)+NDC,FWD)
　　　3/2-3/12: LHe, trigger#25(TPC/2+STD) [標的中に泡成長 not for analysis]
3/24,27: DC1再修理、レーザー系 第1、第2ミラー交換
　　　4/6-4/22, 5/15-5/30, 6/1-6/17, 6/25-7/5: LHe, trigger STD
(5/15: set rate-monitor, 6/1: replace it to new one, 6/24: reset it)
　　　7/7-7/24: LH2, trigger#24 (7/12: solenoid quench  recover soon)
7/25-7/26: 磁場無しラン　(for software alignment)
7/26-28: Cu(test), trigger#24(narrow)
NB）10/15-10/28: AC1 は noisy
6/7-6/9: all DC gains were large due to incorrect gas mixture
6/28-30: peakADC of TPC anode#33 was strange
6/27-7/28: there might be a bad channel in the PADs of sector6, layer5
<Check scalers and singles histograms for all runs with modified online_ana>
Summary and corrected photon numbers of each run used for analysis:

4. Correction factor for Tagger scaler
Calculate the correction factor according to Tech-note No.15 by Kohri　(slightly modified)
Pile-up events: |T(i)-T(j)|< T_width ( best T_width=40nsec)
Correction factor :
R=generated events/(generated events – pile-up events)　
why?

5. Correction factor for
each filling pattern

7. LHe run
17.73±0.51
corrected

8. LD2 run
25.15±0.38
corrected

9. LH2 run
corrected
13.16±0.25

10. Data statistics Corrected tagger photon# ×DAQ live ratio
LHe(Std): x (hori 2.25x1012, vert 2.30x1012)
LD2(#24/#23): 1.64x (hori 0.82x1012, vert 0.82x1012)
[trig# x1012/ trig# x1012]
LH2(#24): x (hori 0.93x1012, vert 1.03x1012)
Luminosity (L=nb・NT　　　 NT =rNA/A　)
Scaling factor of transmission: 0.525± (from PWO data)
Target density of LHe/LD2/LH2 with 15cm at boiling point
1.875 g/cm2, g/cm2, g/cm2
Luminosity: LHe 6.79x1035 cm-2 =0.679 pb-1
LD x1035 cm-2 =0.653 pb-1
LH x1035 cm-2 =0.653 pb-1
cf.) 3GeV LH2 (～0.8x1012x0.532)x(1.062xNA/A) = 0.27 pb-1

11. Check pedestal files (miho:/np1b/v04/sp8lep/ntpc/pede/)
pedestal_mean
Run#
・ remove some strange runs
　(not junk runs in the log-note)
・ ch1253 (Preamp79, ch 5) shows
2 lines.
(sector 6, layer 7, 3rd pad)

12. NTPC gain correction with cosmic-ray data cut: |dip angle|<15°
-1717<z<-1517
Pad (peakAdc) vs wire sum
 good
S wihi /S wi
w-2=w2=
w-1=w1=
w0=
読んでいない両端のWire は　
1番目と27番目のwire の x0.5
が良い

13. z-dependence of Pad gainx y z
(-25<x<25)
(-1717<z<-1517)