ELOG MUST2

Shumpei, Freddy, Megumi, Valérie

Thu Jul 12 07:05:53 2018

RUN 357

start: 6h39
stop: 8h13
e748 Exxx 3,2G 12 juil. 08:13 /data/e748X/e755/acquisition/run/run_0357.dat.12-07-18_06h38m56s
12C primary : 2.0 uA
CATS1: 220 kHz
CATS2: 186 kHz
PL : 192 kHz

Attachment 1: screenshot_2018-07-12_06h43m20s.png

Attachment 2: screenshot_2018-07-12_06h43m40s.png

Attachment 3: screenshot_2018-07-12_06h43m51s.png

Attachment 4: screenshot_2018-07-12_06h44m15s.png

Attachment 5: screenshot_2018-07-12_06h44m30s.png

Attachment 6: screenshot_2018-07-12_06h45m06s.png

Attachment 7: screenshot_2018-07-12_06h46m11s.png

Thu Jul 12 02:12:20 2018

RUN 355

start: 2h04
stop: 4h22

12C primary (1.8 uA)
CATS1: 220 kHz
CATS2: 190 kHz
PL: 198 kHz

Attachment 1: screenshot_2018-07-12_02h15m54s.png

Attachment 2: screenshot_2018-07-12_02h10m36s.png

Attachment 3: screenshot_2018-07-12_02h14m12s.png

Attachment 4: screenshot_2018-07-12_02h14m17s.png

Attachment 5: screenshot_2018-07-12_02h14m31s.png

Attachment 6: screenshot_2018-07-12_02h16m21s.png

Attachment 7: screenshot_2018-07-12_02h16m40s.png

Thu Jul 12 05:03:49 2018

RUN 356

start: 4h24
stop: 6h39

12C primary : 1.8 uA
CATS1: 200 kHz
CATS2: 175 kHz
PL : 180 kHz

Attachment 1: screenshot_2018-07-12_04h25m55s.png

Attachment 2: screenshot_2018-07-12_04h26m16s.png

Attachment 3: screenshot_2018-07-12_04h26m33s.png

Attachment 4: screenshot_2018-07-12_04h26m40s.png

Attachment 5: screenshot_2018-07-12_04h27m07s.png

Attachment 6: screenshot_2018-07-12_04h27m57s.png

Attachment 7: screenshot_2018-07-12_05h08m49s.png

Sat Jul 8 08:39:37 2017

/home/e748/analysis/nptool/Outputs/Analysis/runtest.root (run_0331_0.root?) was analyzed.
DSSD energy vs theta_lab plot for triton is attatched.
The gates to select triton are also shown.
gate;
target position on target
chio vs Qplastic rough Z=4
DSSD energy vs TOF mass=3 and no signal in CsI
Only MM1 is analized.

We need more statistics, but we can't analyze CsI data maybe because position matching with DSSD?

Attachment 1: 2017-07-08_run331_12be_dt_likely.png

Attachment 2: 2017_07_08_gate.png

Attachment 3: 2017_07_08_chio_gate.png

Sun Jul 9 10:27:09 2017

More statistics for (d,t) channel.
Same gate as before () but MM1&MM4 are used.

Attachment 1: E_Theta_dt2.pdf

Attachment 2: E_Theta_dt3.pdf

Sun Jul 9 10:29:20 2017

More statistics for (d,t) channel.
Same gate as before (Message ID: 273 Entry time: Sat Jul 8 08:39:37 2017) but MM1&MM4 are used.
Figures are with 12Be(d,t) kinematics for all events and (events per bin)>6.
Energy a little bit higher or angle a little bit smaller than kinematics?

Attachment 1: E_Theta_dt2.pdf

Attachment 2: E_Theta_dt3.pdf

Sun Jul 9 11:56:31 2017

Shumpei, Daisuke wrote:

Hi,

Thanks for looking into it. We made quite a lot of change in the analysis yesterday. There was several mistake and especially one on cats inverting X axis, so all angle were wrong previously.

Also the energy loss in the target is setup for 3He, so you expect the 3H line to show at a higher energy than it should ! Sounds good!

Sun Jul 9 13:42:26 2017

10Be(d,t) & 10Be(d,3He)?

Same analysis for (d,t) channel but 10 Be beam. run368-374.4 (-1 day data)
Separation for Z=3&4 with CHIO(analog) + plastic is difficult so Z=4 gate may include Z=3&4.
Figures are with 10Be(d,t)9Be and 10Be(d,3He)9Li kinematics for all events and (events per bin)>4.

Attachment 1: dE_E_CHIO_pla.pdf

Attachment 2: E_Theta_dt_10Be2.pdf

Attachment 3: E_Theta_dt_10Be3.pdf

Sun Jul 9 16:44:58 2017

Elastic scattering MM6&7

Telescope 6&7 are analyzed for 12Be beam.
The energy of Si vs angle plot for each telescope (CsI veto and beam position gate on target) is shown.
For MM6 (left), a locus for punch-through is seen maybe because CsI veto gate is not so good.
The red lines are kinematics for 12Be(d,d) and (p,p).
Two loci seem to correspond to each elastic scattering.

Attachment 1: 12Be_elastic.pdf

Fri Jul 7 00:42:50 2017

Rough energy calibration for CsI was performed (only for MM1 and MM4).
Method;
Gate DSSD (300 um) energy = 2 MeV. This corresponds to
p energy remain 12.3 MeV
d energy remain 25.5 MeV
t energy remain 38.7 MeV
Gate DSSD (300 um) energy = 6 MeV. This corresponds to
alpha energy remain 72.5 MeV
4 points liner fit for cristal by cristal.

Calibration file is at
/home/e748/analysis/nptool/Projects/e748/Calibration/Energy/Calibration/CsI_test/

Attachment 1: CsICalib.pdf

Fri Jul 7 00:43:51 2017

Attachment 1: CsICalib.pdf

e755

Sat Jun 30 15:07:43 2018

37Ca (p,d) 36Ca reaction is analyzed (run 191-195).

Gate condition;
1. beam on target by CATS1&2
2. TOF gate for 37Ca
3. recoil deutron gate by MUST2 only T3
4. fragment gate by CHIO and plastic

Only T3 is used for analysis and the angle is intentionally shifted 1.0 deg to match the kinematics for 40Ca (p,d).

Ground and 2+ state of 36Ca are observed in Z=20 gate, while a higher lying state is seen in Z=19 gate.
This result seems to be consistent with that of 38Ca (p,t) 36Ca.

Attachment 1: 37Capd.pdf

Attachment 2: 37Capd_ex.pdf

Analysis for 10C(p,d)9C and 10C(p,t)8C

Sun Jul 8 07:19:45 2018

Used data : Run 0284 & 0285 (about 4 hours data)
CsI energy calibration parameters are from previous experiment, optimized for deuteron

10C(p,d)9C
gate:
1. target gate by CATS1&2
2. deuteron gate by MUST2 dE-E
3. fragment gate by CHIO and plastic for Z=6,5,4
Ground state of 9C (bound) and first excited state of 9C (2.2 MeV, decay to 8B + p) are seen.

10C(p,t)8C
1. target gate by CATS1&2
2. triton gate by MUST2 dE-E
Not clear as (p,d) but sign of ground state is seen.
Kinematics is shifted for each telescope, probably because energy calibration and the position of the telescopes can be shifted.
Coincidence of alpha and (or) multi-proton can be helpful.

Attachment 1: pd_fig1.pdf

Attachment 2: pd_fig2.pdf

Attachment 3: pt_fig1.pdf

Attachment 4: pt_fig2.pdf

Analysis for 10C(p,d)9C and 10C(p,t)8C updated

Tue Jul 10 01:26:21 2018

Used data run run0284-0302 (almost all for 10C beam)
CsI calibration parameters are the same as E755 exp (deuteron optimized),

10C(p,d)9C
Gate:
1. beam position on the target by CATS1&2
2. deuteron gate by dE-E MUST2 T1-T4
Offset of the position of MUST2 T1-T4 was determined by 10C beam direct hit component. Target Z position (beam direction) is shifted 12 mm to match kinematics of 9C g.s.
Ground state of 9C and first excited state of 9C (2.2 MeV) are clear. Higher excited state around 6 MeV.
Statistics for T2 is smaller because 2 CsI crystals are not working (known before E755 exp,).

10C(p,t)8C
Gate:
1. beam position on the target by CATS1&2
2. triton gate by dE-E MUST2 T1-T4
Same position offset of (p,d) is used.
Ground state of 8C is clear, but energy of each CsI crystal seems to be shifted.

Attachment 1: c10pd0.png

Attachment 2: c10pd1.png

Attachment 3: c10pd2.png

Attachment 4: c10pt0.png

Attachment 5: c10pt1.png

Attachment 6: c10pt2.png

Analysis for 9C beam setting

Tue Jul 10 05:23:19 2018

Used data: run0312 (about 80 minutes data taking).
Analysis for (p,d) channel and invariant mass

CATS1_HF TOF information for beam PID
Wait for more statistics for (p,t) channel

Attachment 1: be7li6pd.png

Attachment 2: c9b8pd.png

Attachment 3: missing_invariant_mass.png

triton contamination in the 9C beam setting

Tue Jul 10 05:25:42 2018

In MUST2 dE-E plot, strong locus for triton E ~ 40 MeV exists.
Kinematics for triton bellow 45 MeV matches the kinematics of triton 40MeV beam proton elastic scattering.
If coincidence of proton required, still exists for some region (proton forward scattering with enough energy to pass through DSSD).
Kinematics for proton matches the kinematics of recoil proton by 40MeV triton beam.
Sum of the proton and triton energy has a peak around 40 MeV.
Locus still exists with TOF gate by CATS1-HF.

Triton energy for (p,t) reaction will be higher than ~ 50 MeV, so can't be a background.
The total number of triton bellow 45 MeV and above DSSD range in run0312 (80 minutes) is ~ 20000 (~ 4 cps for all the telescope).

Attachment 1: triton_contaminant0.png

Attachment 2: triton_contaminant1.png

Attachment 3: triton_contaminant2.png

Analysis with only one of the CATSs

Thu Jul 12 04:40:32 2018

Analyzed data : run 0331
Used reaction : 7Be(p,d)6Be (ground state and 2+ state 1.6 MeV are mainly populated).

Method;
X and Y position on each CATS is compared with position on the target deduced by both CATSs. Assuming the beam profile is not changing, the correlation of these positions can by fit by linear function.
The position on the target can reconstructed with only one of the CATSs, with worse resolution. Beam angular spread seems rather small than angular deduced by only 1 CATS.
In terms of the excitation energy resolution,
sigma of the Subtraction of (both CATS Ex)-(only CATS1 Ex) ~ 0.53 MeV
sigma of the Subtraction of (both CATS Ex)-(only CATS2 Ex) ~ 0.32 MeV
Original estimated Ex resolution is ~ 1 MeV, so not so bad.
In terms of the background from the frame of the target cell, roughly can be removed by target position. Near the center part gate should be more secure.

Attachment 1: cats1.png

Attachment 2: cats2.png

Attachment 3: cats3.png

Attachment 4: cats4.png

Analysis of 9C beam setting

Thu Jul 12 07:43:25 2018

Used data : run0312-0355

For (p,t) reaction, the value of the mass for N=1 isotone is taken from proposal, so it can be shifted.
3He coincidence gate is applied to remove the beam triton background.

Attachment 1: c9b8pd2.png

Attachment 2: be7li6pt.png

Attachment 3: c9b8pt.png