Post on 05-Jun-2022
Summary of Spring 2015 Commissioning run
A. DeurJefferson Lab
A. Deur. GlueX collaboration meeting. 05/12/2015
Monday, May 11, 2015
1.Commission goniometer and diamonds ✓.
2.Commission H2 cryotarget and verify alignement ✓.
3.Run DAQ in Block-Mode at high rates ✓.
4.Optimization of triggers ✓.
5.Callibrate calorimeters with π0 .
6.Complete other detector callibrations and alignments ✓.
7.Commission beam stability feedbacks .
8.Establish that we can run the solenoid at 1300A ✗.
9.Commission accelerator RF timing ✓.
10.Commission photon polarimeter .
11.Commission Total Absorption Counter ✗.
12.Use (polarized) photons with 3.4mm collimator ✗.
Spring 2015 goals
A. Deur. GlueX collaboration meeting. 05/12/2015
Highest priority
Lower priority
High priority
Important
Monday, May 11, 2015
New conditions for Spring 2015 commissioning
•10.5 GeV Nominal; CHL failure: all useful data taken at 5.5 GeV.•~5 nA-200 nA. •RF timing available.
•Diamond radiators: SI45-S90 (90µm), J1A50 (50µm), J2A100.
•Cryotarget. (30cm. No more long air gap around the target).
•Polarimeter on the beam line. Tot. Abs. Count. available. Static profiler.
•Improvements on all subsystems (DAQ, trigger, online, Start Counter straighten,...)
A. Deur. GlueX collaboration meeting. 05/12/2015
•e- beam:
Run plans:https://halldweb.jlab.org/hdops/wiki/index.php/Spring_2015_Commissioning_Plan
https://halldweb.jlab.org/hdops/wiki/index.php/Spring_2015_6GeV_Commissioning_Plan
Original (10.5 GeV):
Revised (5.5 GeV):
Disclamer: Accelerator commissioning: not physics running.
Monday, May 11, 2015
Run plan
A. Deur. GlueX collaboration meeting. 05/12/2015
Tasks at same y-axis value are interspersed
Tune
e- b
eam
to ta
gger
Hal
l (8h
)R
esto
re !
beam
(8h)
goni
o. c
omm
. (8h
)In
itial
subs
yste
m c
heck
out (
8h)
µsc
ope
bias
stud
y (2
h)FF
B te
sts (
8h)
LH2 t
gt c
omm
. (em
pty
run)
(38h
)
goni
o. c
omm
. (8h
)
ST,T
OF
FCA
L,BC
AL
trig
. for
DC
alig
n,FC
AL-
ST c
oinc
.,tr
igge
r st
udie
s
48h
DA
Q te
sts (
16h)
Sol. Magnet at 1200A
Target filled (Mostly) empty tgt Filled tgt
PS tr
igge
r co
mm
. (8h
)So
l. ra
mp
dow
n
DC
alig
nmen
t (20
h)
goni
o. c
omm
. w/
FCA
L-TO
F tr
igge
r (8
h)
Possible furtherDC align. if needed
mul
ti tr
igge
r co
mm
. (8h
)
Sol. B=0
goni
o. c
omm
. (8h
)So
l. ra
mp
upPr
oduc
tion
run
(8h)
Sol. I=1300A Sol.
I=12
00A
goni
o. c
omm
. (8h
)
prod
uctio
n ru
n (2
0h)
10 days period.(5.5 GeV, no extension)
Monday, May 11, 2015
Run plan
A. Deur. GlueX collaboration meeting. 05/12/2015
Tasks at same y-axis value are interspersed
Tune e- bea
m to ta
gger H
all (8h
)Res
tore ! b
eam (8h
)gon
io. com
m. (8h
)Init
ial sub
system
checko
ut (8h)
µscope
bias st
udy (2h
)FFB
tests (
8h)
LH2 tgt
comm.
(empty
run) (3
8h)
gonio. c
omm.
(8h)
ST,TO
FFC
AL,BC
ALtrig
. for D
C align
,FC
AL-ST
coinc.,
trigger
studies
48h
DAQ t
ests (16
h)
Sol. Magnet at 1200A
Target filled (Mostly) empty tgt Filled tgt
PS trig
ger com
m. (8h
)Sol
. ramp
down
DC ali
gnment
(20h)
gonio. c
omm.
w/FC
AL-TO
F tri
gger (8
h)
Possible furtherDC align. if needed
multi t
rigger c
omm.
(8h)
Sol. B=0
gonio. c
omm.
(8h)
Sol. ra
mp up
Produc
tion run
(8h)
Sol. I=1300A Sol. I=
1200A
gonio. c
omm.
(8h)
produc
tion run
(20h)
e- b
eam
tun
ning
or n
o be
am
Esta
blis
h ph
oton
bea
m
Stra
ight
tra
ck r
uns
DA
Q/t
rigg
er w
ork
Act
ive
col.
scan
s
Dia
mon
d al
ignm
ent
(J1A
50, 5
0µm
)
Fri. Apr. 24th
Pola
rize
d da
ta t
akin
g
Mea
nwhi
le,tr
igge
r w
ork
DA
Q/P
S/Tr
igge
r w
ork
Dia
mon
d al
ignm
ent
(SI45-S9
0, 9
0µm
)
e- b
eam
tun
ning
Dia
mon
d al
ignm
ent
(SI45-S9
0, 9
0µm
)St
raig
ht t
rack
run
s
Microscope bias voltage study
FFB
test
Dia
mon
d al
ign.
(90µ
m)
DA
Q/T
rigg
er w
ork
Unp
olar
ized
run
s
FFB
test
Stra
ight
tra
ck r
uns
Empt
y ta
rget
run
DA
Q/T
rigg
erFF
B te
st
DA
Q/T
rigg
erU
npol
ariz
ed r
uns
Dia
mon
d se
tup
(50µ
m)
Pola
rize
d da
ta t
akin
gQ
uenc
h
Stra
ight
tra
ck r
uns
DA
Q/T
rigg
er
Actual progression:
Stra
ight
tra
ck r
uns
Monday, May 11, 2015
Timeline of actual run
A. Deur. GlueX collaboration meeting. 05/12/2015
Feb. 13: Starting Acc. beam restoration
May. 4, 7am
: End of run
March 19-25: Restoration of 10.5 GeV beam to Hall D.Why so long ?
•Usual accelerator woes (BLM, CHL trips, LCW problems...)
•Lower priority compared to Hall A. Could not run A&D concurently: RF separator needed to be functional.
Power failure. Dammaged one CHL. Cannot run 12 GeV CEBAF.
Decision to run 5.5 GeV withpossible 10 days extension.Extension granted only to Hall B(and a bit for Hall A). Priority shifted from mostly A to mostly B.
Apr. 23: Start 5.5 GeV beam tunning to Hall D
Apr. 25: Good 5.5 GeV beam available
May. 2, 14h37: Solenoidquenched.
B=0
Beam restoration
Monday, May 11, 2015
Achievements
A. Deur. GlueX collaboration meeting. 05/12/2015
•First photons on liquid Hydrogen target.
30 cm H2 target
Vacuum chamber
exit window
Solid plastic target
Vertex reconstruction: (Simon Taylor)
Monday, May 11, 2015
Achievements
A. Deur. GlueX collaboration meeting. 05/12/2015
•Empty target vertex reconstruction for target alignment verification. (Simon Taylor)
H2 gas
air
Monday, May 11, 2015
Achievements
A. Deur. GlueX collaboration meeting. 05/12/2015
•Goniometer commissioning. 2 diamonds aligned. Coherent peak seen. Ken Livingston, Hovanes Egiyan, Paul Mattione.
Coherent peak seen on tagger detectors.
Monday, May 11, 2015
Achievements
A. Deur. GlueX collaboration meeting. 05/12/2015
Coherent peak also seen with pair-spectrometer.
With amorphous radiator: no coherent peak
x 5.5 GeV
x5.5 GeV
With diamond radiator: coherent peak
•Goniometer commissioning. 2 diamonds aligned. Coherent peak seen. Ken Livingston, Hovanes Egiyan, Paul Mattione.
Monday, May 11, 2015
Achievements
A. Deur. GlueX collaboration meeting. 05/12/2015
•π0 peak seen in the two calorimeters (Justin Steven, Will McGinley).
•3.5 hour run: 20% of the stat. of the Fall 2014 run. •Good statistics (DAQ and triggers: Sergei Furletov, Alex Somov) (~1% of what would be needed for a good BCal calibration.)
BCal.
Monday, May 11, 2015
Achievements
A. Deur. GlueX collaboration meeting. 05/12/2015
FCal.
•ρ peak also seen.
•π0 peak seen in the two calorimeters (Justin Steven, Will McGinley).
Monday, May 11, 2015
Achievements
A. Deur. GlueX collaboration meeting. 05/12/2015
3.5h of data with polarized photons. (other few hours of polarized data available. different conditions)
No asymmetry observed with amorphous radiator:
ρ0 meson production
Justin Stevens
ρ0 π0
π0 meson production
Monday, May 11, 2015
Summary
A. Deur. GlueX collaboration meeting. 05/12/2015
Gluonic
Feb. 27. We waited fordeparture full of hopes: up to 2 months of 10.5 GeV beam.RF Separator commis.+3 halls running withlow priority for Hall D makes us wait4 weeks before seeingacceptable beam.
Monday, May 11, 2015
Summary
A. Deur. GlueX collaboration meeting. 05/12/2015
Gluonic
March 25. Just as beam became acceptable, a power failure dammage an accelerator cooling plant.(Ice dammages).
Accelerator repairattempts. Uncertaintyon the outcome.
Feb. 27. We waited fordeparture full of hopes: up to 2 months of 10.5 GeV beam.RF Separator commis.+3 halls running withlow priority for Hall D makes us wait4 weeks before seeingacceptable beam.
Monday, May 11, 2015
Summary
A. Deur. GlueX collaboration meeting. 05/12/2015
Gluonic
March 25. Just as beam became acceptable, a power failure dammage an accelerator cooling plant.(Ice dammages).
Accelerator repairattempts. Uncertaintyon the outcome.
Continue at 10.5 GeV?
Shutdown
Continue at 5.5 GeV?Extension?
Feb. 27. We waited fordeparture full of hopes: up to 2 months of 10.5 GeV beam.RF Separator commis.+3 halls running withlow priority for Hall D makes us wait4 weeks before seeingacceptable beam.
Monday, May 11, 2015
Summary
A. Deur. GlueX collaboration meeting. 05/12/2015
Gluonic
March 25. Just as beam became acceptable, a power failure dammage an accelerator cooling plant.(Ice dammages).
Accelerator repairattempts. Uncertaintyon the outcome.
Continue at 10.5 GeV?
Shutdown
Apr. 25-May 2:Smooth sailingthrough 5.5 GeVcommissioning: Coherent peak,DAQ, triggers...
Continue at 5.5 GeV?Extension?
Gluoni
c
Feb. 27. We waited fordeparture full of hopes: up to 2 months of 10.5 GeV beam.RF Separator commis.+3 halls running withlow priority for Hall D makes us wait4 weeks before seeingacceptable beam.
Monday, May 11, 2015
Summary
A. Deur. GlueX collaboration meeting. 05/12/2015
Gluonic
March 25. Just as beam became acceptable, a power failure dammage an accelerator cooling plant.(Ice dammages).
Accelerator repairattempts. Uncertaintyon the outcome.
Continue at 10.5 GeV?
Shutdown
Apr. 25-May 2:Smooth sailingthrough 5.5 GeVcommissioning: Coherent peak,DAQ, triggers...
Continue at 5.5 GeV?Extension?
Gluoni
c
Gluonic
May 2.Solenoidquench,after 3.5hof data taking with polarized photos
Feb. 27. We waited fordeparture full of hopes: up to 2 months of 10.5 GeV beam.RF Separator commis.+3 halls running withlow priority for Hall D makes us wait4 weeks before seeingacceptable beam.
Monday, May 11, 2015
Summary
A. Deur. GlueX collaboration meeting. 05/12/2015
Gluonic
March 25. Just as beam became acceptable, a power failure dammage an accelerator cooling plant.(Ice dammages).
Accelerator repairattempts. Uncertaintyon the outcome.
Continue at 10.5 GeV?
Shutdown
Apr. 25-May 2:Smooth sailingthrough 5.5 GeVcommissioning: Coherent peak,DAQ, triggers...
Continue at 5.5 GeV?Extension? May 4, 7am:
Beam shut down (no extensionfor Hall D).
Gluoni
c
Gluonic
May 2.Solenoidquench,after 3.5hof data taking with polarized photos
⚓
Feb. 27. We waited fordeparture full of hopes: up to 2 months of 10.5 GeV beam.RF Separator commis.+3 halls running withlow priority for Hall D makes us wait4 weeks before seeingacceptable beam.
Monday, May 11, 2015
Summary
A. Deur. GlueX collaboration meeting. 05/12/2015
Gluonic
March 25. Just as beam became acceptable, a power failure dammage an accelerator cooling plant.(Ice dammages).
Accelerator repairattempts. Uncertaintyon the outcome.
Continue at 10.5 GeV?
Shutdown
Apr. 25-May 2:Smooth sailingthrough 5.5 GeVcommissioning: Coherent peak,DAQ, triggers...
Continue at 5.5 GeV?Extension? May 4, 7am:
Beam shut down (no extensionfor Hall D).
May 6:First physicsassymetriesseen.
Gluoni
c
Gluonic
May 2.Solenoidquench,after 3.5hof data taking with polarized photos
⚓
⚓
Feb. 27. We waited fordeparture full of hopes: up to 2 months of 10.5 GeV beam.RF Separator commis.+3 halls running withlow priority for Hall D makes us wait4 weeks before seeingacceptable beam.
Monday, May 11, 2015
Spring 2015 goals
A. Deur. GlueX collaboration meeting. 05/12/2015
High priority
Obtaining physics asymmetries summarizes the outcome of reaching these goals.
1.Commission goniometer and diamonds ✓.
2.Commission H2 cryotarget and verify alignement ✓.
3.Run DAQ in Block-Mode at high rates ✓.
4.Optimization of triggers ✓.
5.Callibrate calorimeters with π0 .
6.Complete other detector callibrations and alignments ✓.
7.Commission beam stability feedbacks .
8.Establish that we can run the solenoid at 1300A ✗.
9.Commission accelerator RF timing ✓.
10.Commission photon polarimeter .
11.Commission Total Absorption Counter ✗.
12.Use (polarized) photons with 3.4 mm collimator ✗.
Monday, May 11, 2015