T-980 Details & Results of EOS for Dec 2, 2009 with O-05-09
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Transcript of T-980 Details & Results of EOS for Dec 2, 2009 with O-05-09
D. Still 2T-980 Meeting - Dec 17, 2009
Outlook
Quick look at Channeling for O-05-09 crystal.
Collimating Volume Reflected (VR) Beam at F172H collimator.
Attempting to look at ring wide losses for CH, VR and no colliamtion.
D. Still 3T-980 Meeting - Dec 17, 2009
Basic Bent Crystal Stuff
(Analysis by V. Shiltsev)(Analysis by V. Shiltsev)
Channeled beam Volume Reflected Beam (VR)
D. Still 4T-980 Meeting - Dec 17, 2009
Goniometer Installations
Newly built and installed (Summer 2009) Vertical goniometer at E0.It is ~ 4m upstream of the Hor. one. Ver. goniometer houses old O-shaped crystal (reversed for negative miscut) and multi-strip crystal.
Modified horizontal goniometer. Replaced old large-miscut angle O-shaped crystal with new small miscut O-shaped during Summer 2009.
4
D. Still 5T-980 Meeting - Dec 17, 2009
New Crystals
Name: O-BNL-02Bend: 410uradMiscut: 1600 urad
Name: MS-08-09Bend: 63urad (VR)
Name: O-01-09Bend: 315uradMiscut:195urad
Name: O-05-09Bend: 360uradMiscut: 120urad
Broken during installation Installed Ver Dnstrm goniometer
Installed Hor goniometer Installed Ver Upstrm goniometer
5
D. Still 6T-980 Meeting - Dec 17, 2009
Overview of Dec 2, 2009 Study period
Dec 2, 2009 Study period
-2000
-1500
-1000
-500
0
500
22 22.5 23 23.5 24 24.5 25 25.5 26
time (hours)
Po
siti
on
(m
ils)
T:E0CCA2 T:E03HCP T:F12HCP
3 Angle scans
1
2 3
2 E03h scans 8 F172H scans
D. Still 8T-980 Meeting - Dec 17, 2009 8
First 980-GeV Beam Test with New Setup
2urad angle scan over channel of O-05-09 crystal on Oct 30,2009
0
200
400
600
800
1000
1200
1400
1600
1800
2000
-1060 -1010 -960 -910 -860 -810 -760 -710
T:E0CCA2 laser angle (urad)
Lo
ss (
hz)
t:lmf17ac t:e1labt
Channeled beam (abort gap)Channeled into E03 collimator
channel
New detector at F17
D. Still 9T-980 Meeting - Dec 17, 2009
Compare BNL to O-05-09
Compare BNL to O-05-09
-1000
1000
3000
5000
7000
9000
11000
13000
15000
400 500 600 700 800 900 1000 1100 1200
laser angle (urad)
Lo
ss (
hz)
10/30/2009 10/3/2008
Compare BNL to O-05-09
-1000
1000
3000
5000
7000
9000
11000
13000
15000
400 500 600 700 800 900 1000 1100 1200
laser angle (urad)
Lo
ss (
hz)
10/30/2009 10/3/2008 guassian fit 2009 guassian fit 2008
2008 O-BNL-02 sigma=30 urad
2009 O-05-09 sigma = 16 urad
D. Still 11T-980 Meeting - Dec 17, 2009
First E03H collimator scan in the channel
E03H collimator scan (into beam) of O-05-09, channel point -970urad, Oct 31, 2009
0
5
10
15
20
25
30
35
40
45
50
0 50 100 150 200 250 300
E03H Collimator position (mils)
LE
033,
LM
F17
A L
oss
-100
100
300
500
700
900
1100
1300
1500
E1L
AB
T, E
1LB
NC
Lo
ss
(hz)
T:LMF17A t:le033c T:E1LABT t:e1lbcc
D. Still 12T-980 Meeting - Dec 17, 2009
E03H Coll Scan compare 2005,2008,2009O-BNL-02 to O-05-09 crystals
Displaced channeled beam at E03H for different cyrstals
0
0.5
1
1.5
2
2.5
3
-10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0
E03H collimator position (mm)
Lo
ss o
n L
E03
3 (v
olt
s)
Le033- 2005 (CH) O-BNL-02 crystal out
le033 2008 (CH) O-BNL-02 le033 2009 o-05-09
D. Still 13T-980 Meeting - Dec 17, 2009
Difference in E03H moving IN and OUT
Displaced channeled beam at E03H for 2009 run w/ O-05-09 crystal
0
0.5
1
1.5
2
2.5
3
-10.0 -9.0 -8.0 -7.0 -6.0 -5.0 -4.0 -3.0 -2.0 -1.0 0.0
E03H collimator position (mm)
Lo
ss
(v
olt
s)
Lo
ss
(h
z)
le033 2009 o-05-09 le033 dec 2009 O-05-09
lmfa17 dec 2009 OUT lmfa17a oct 2009 IN
D. Still 14T-980 Meeting - Dec 17, 2009
Bend Angle mismatch??
Crystal Bend Angle Measured E03H
displacement
(mm)
Expected E03H
displacement
(mm)
Measured displacement
equivalent angle
O-BNL-02 410urad 7.3 9.7 308 urad
O-05-09 360urad 5 8.5 210 urad
D. Still 16T-980 Meeting - Dec 17, 2009
3 different angular scans for O-05-09
Angle scan compare of E1LABT
0
500
1000
1500
2000
2500
3000
-1100 -1000 -900 -800 -700 -600 -500
angle (urad)
Lo
ss (
Hz)
angle scan 1
angle scan 2, Rev, E0VPOS = -.28mm
angle scan 3, E0VPOS = -.5mm, F17H&V out
D. Still 17T-980 Meeting - Dec 17, 2009
Effects of B0PAGC during 3 angle scans
Compare B0PAGC for 3 angle scans for O-05-09E03H collimator NOT at Max Catch
0
500
1000
1500
2000
2500
3000
3500
4000
-1200 -1100 -1000 -900 -800 -700 -600 -500
angle (urad)
Lo
ss (
hz)
angle scan 1
angle scan 2, Rev, E0VPOS = -.28mm
angle scan 3, E0VPOS = -.5mm, F17H&V out
D. Still 19T-980 Meeting - Dec 17, 2009
STRUCT/CRYAPR Beam Loss: New O-shaped (H)
E03 and F172 collimators and xtal
Rest of the Tevatron
Loss profiles are when crystal is at angle for channel.
Bend angle of crystal (O-05-09) = 360 urad
D. Still 21T-980 Meeting - Dec 17, 2009
VR Beam at F172H Collimators
Horizontal Orbit due to Crystal Angles at F172 collimator
F172 Coll
F173 targetF17 spool
F171 coll
-5
-4
-3
-2
-1
0
1
2
3
4
5
1290 1295 1300 1305 1310 1315
location
(mm
)
Displacement (mm) F17 spool
F171 coll F172 Coll
F173 target F18 spool
Displacement in channel (mm) Displacement in V.R (mm)
VR Beam should be~ .9mm from coreFor ~ VR angle of 16urad.
Displacement for V.R (mm) angle plot starting at D49
-5
-4
-3
-2
-1
0
1
2
3
4
-1500 500 2500 4500 6500
Displacement in V.R(mm)
Result of ring orbit for 16urad
Kick simulating effect of VR kick.
Extracted and circulating beams position in the Tevatron at collimation in horizontal plane with 3-mm channeling crystal located at EO straight section. Transverse plane is shown at EO3 (left) and F172 (right) collimators entrance for particles with momentum dP/P=0 (top), dP/P=-0.0002 (middle) and both (bottom).
November 2, 2007 A.Drozhdin
At F172H CollimatorAt E03H Collimator
CH AM VR
CH
AMVR
D. Still 23T-980 Meeting - Dec 17, 2009
E03H collimator scan data
E03H Scan # Start time of scan
(Dec 2, 2009 hour)
End time of Scan Crystal angle (urad)
Crystal Position
1 24.59 24.753 -970 CH
2 24.753 24.959 -970 CH
Define E03H collimator at “Max Catch” position = 260 mils to stop all particles without the E03H collimator becoming the leading edge.
Max catch position
D. Still 24T-980 Meeting - Dec 17, 2009
F172H collimator scan data
F172H Scan # Start time of scan
(Dec 2, 2009 hour)
End time of Scan Crystal angle (urad)
Crystal Position
1 25.17 25.316 -970 CH
2 25.35 25.428 -970 CH
3 25.428 25.5603 -881 VR
4 25.66 25.76 -815 VR
5 25.70 25.84 -684 AM
6 25.84 25.9025 -914 VR
7 25.902 25.9917 -914 VR
8 26.01 26.12 -971 CH
E03H collimator is at “Max Catch” position = 260 mils
D. Still 25T-980 Meeting - Dec 17, 2009
Finding VR beam at F17
F172H scan w/ angle at channel-970urad.
F172H scan w/ angle at VR -882urad
Maybe Collimated VR beam
Displacement difference ~ 45 mils or 1.125 mm
D. Still 26T-980 Meeting - Dec 17, 2009
Another look at Collimated VR beam at F172H at different VR angle.
Crystal angle in VR regionE0CCA2 = -914urad
Crystal angle in CHANNEL region E0CCA2 = -971urad
D. Still 27T-980 Meeting - Dec 17, 2009
VR present when there is channeled beam
Simulations predict that when the crystal angle is set to channelthere is also scattered and VR present.
VRCH AM
These simulations are with the crystal placed at 5
D. Still 28T-980 Meeting - Dec 17, 2009
Collimated CH & VR beam at F17 Collimator
F172H collimator scan w/ angle at CH (-970urad) & VR(-881urad)
-10
0
10
20
30
40
50
60
50 100 150 200 250 300
F172H Collimator Position (mils)
Lo
ss (
Kh
z)
LMF17A for channel LMF17A for VR
D. Still 29T-980 Meeting - Dec 17, 2009
F172H Collimation CH,VR,AM beam
F172H collimator scan w/ angle at CH (-970urad) & VR(-881urad) & AM (-684 urad)
0
10
20
30
40
50
60
50 100 150 200 250 300
F172H Collimator Position (mils)
Lo
ss (
hz)
LMF17A for channel LMF17A for VR LMF17A for Amorphous (AM)
D. Still 30T-980 Meeting - Dec 17, 2009
Effects of Collimating VR Beam at CDF
F172H collimator scan w/ angle at CH (-970urad) & VR(-881urad)
0
10000
20000
30000
40000
50000
60000
70000
80000
90000
50 100 150 200 250 300
F172H Collimator Position (mils)
Lo
ss (
hz)
0
10
20
30
40
50
60
B0PAGC for CH B0PAGC for VR LMF17A for channel LMF17A for VR
D. Still 31T-980 Meeting - Dec 17, 2009
B0PAGC as F172H moves in
F172H collimator scan w/ angle at CH (-970urad) & VR(-881urad) & AM (-684 urad)
0
10000
20000
30000
40000
50000
60000
70000
80000
90000
50 100 150 200 250 300
F172H Collimator Position (mils)
Lo
ss (
hz)
B0PAGC for CH B0PAGC for VR B0PAGC for AM
D. Still 32T-980 Meeting - Dec 17, 2009
F172H collimator scan w/ angle at CH (-971urad) & VR(-914urad) & AM (-684 urad)
Collimator starts in beam, moves out
0
2000
4000
6000
8000
10000
12000
14000
16000
18000
50 100 150 200 250 300
F172H Collimator Position (mils)
Lo
ss (
hz)
-10
0
10
20
30
40
50
60
B0PAGC for CH B0PAGC for VR LMF17A for channel LMF17A for VR
D. Still 33T-980 Meeting - Dec 17, 2009
B0PAGC level is elevated when F172H is “IN”
EOS Study period- F17H2 scan with B0PAGC
0
10000
20000
30000
40000
50000
60000
70000
80000
25 25.2 25.4 25.6 25.8 26 26.2
time (hours)
Lo
ss
0
50
100
150
200
250
300
350
F17
2H p
osi
tio
n (
mil
s)
C:B0PAGC T:F12HCP
D. Still 34T-980 Meeting - Dec 17, 2009
Ring Losses for channel vs. amorphous angles
Crystal angle set in amorphous region Crystal angle set to channel = -970urad
Maybe argue there is more local loss?? tough
D. Still 35T-980 Meeting - Dec 17, 2009
F17 Instrumentation – Abort Gap LossRF station 5 tripping causing more losses in abort gapF1 abort gap losses
E1 abort gap losses
D. Still 36T-980 Meeting - Dec 17, 2009
F17 Instrumentation – Bunch Loss
F1 bunch loss
E1 bunch loss
D. Still 37T-980 Meeting - Dec 17, 2009
Additional detector hooked up
Todd hooked this paddleyesterday and it is getting database entries and should be available soon.
This should be equivalent to the LE0PIN and hopefully more sensitive.
T-980 Meeting - Dec 17, 2009
D. Still 38
H4 – MVR in a single crystal IUnder proper axial alignement VR from main and skew planes collapse in MVR in a single crystal
D. Still 39T-980 Meeting - Dec 17, 2009
What should next EOS contain? There are questions about TEL and abort gap losses?
There is new instrumentation installed now that might be able to help with answering this.
What are we missing about fundamental displacement? Should large angle scans for O-05-09 be on our list of
EOS?