T-980 Details & Results of EOS for Dec 2, 2009 with O-05-09

T-980 Details & Results of EOS

for Dec 2, 2009 with O-05-09

D. Still

Dec 8, 2009

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.


Basic Bent Crystal Stuff

(Analysis by V. Shiltsev)(Analysis by V. Shiltsev)

Channeled beam Volume Reflected Beam (VR)


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


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


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


2nd Demonstration of channeling with new O-05-09 crystal

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


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


-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


A look at crystal bend angles


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


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


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


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


A look at Crystal angle scans


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


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


Compare Simulated channel loss to data


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


A Look at VR beam from O-05-09


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


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


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


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


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


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


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


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


Lo

ss (

hz)

LMF17A for channel LMF17A for VR LMF17A for Amorphous (AM)


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


Lo

ss (

hz)

0

10

20

30

40

50

60

B0PAGC for CH B0PAGC for VR LMF17A for channel LMF17A for VR


B0PAGC as F172H moves in


0

10000

20000

30000

40000

50000

60000

70000

80000

90000

50 100 150 200 250 300


Lo

ss (

hz)

B0PAGC for CH B0PAGC for VR B0PAGC for AM



Collimator starts in beam, moves out

0

2000

4000

6000

8000

10000

12000

14000

16000

18000

50 100 150 200 250 300


Lo

ss (

hz)

-10

0

10

20

30

40

50

60

B0PAGC for CH B0PAGC for VR LMF17A for channel LMF17A for VR


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


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


F17 Instrumentation – Abort Gap LossRF station 5 tripping causing more losses in abort gapF1 abort gap losses

E1 abort gap losses


F17 Instrumentation – Bunch Loss

F1 bunch loss

E1 bunch loss


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


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?

Documents

T-980 Details & Results of EOS for Dec 2, 2009 with O-05-09