t 980 details results of eos for dec 2 2009 with o 05 09 n.
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T-980 Details & Results of EOS for Dec 2, 2009 with O-05-09. D. Still Dec 8, 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.

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Presentation Transcript
outlook
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

basic bent crystal stuff

(Analysis by V. Shiltsev)

Basic Bent Crystal Stuff

Volume Reflected Beam (VR)

Channeled beam

D. Still

goniometer installations
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.

D. Still

4

new crystals
New Crystals

Name: O-01-09

Bend: 315urad

Miscut:195urad

New

New

Name: MS-08-09

Bend: 63urad (VR)

Broken during installation

Installed VerDnstrmgoniometer

Name: O-05-09

Bend: 360urad

Miscut: 120urad

New

Name: O-BNL-02

Bend: 410urad

Miscut: 1600 urad

Installed Horgoniometer

Installed VerUpstrmgoniometer

D. Still

5

overview of dec 2 2009 study period
Overview of Dec 2, 2009 Study period

2 E03h scans

8 F172H scans

2

3

1

3 Angle scans

D. Still

first 980 gev beam test with new setup
First 980-GeV Beam Test with New Setup

New detector at F17

Channeled beam (abort gap)

Channeled into E03 collimator

channel

D. Still

8

compare bnl to o 05 09
Compare BNL to O-05-09

2008 O-BNL-02

sigma=30 urad

2009 O-05-09

sigma = 16 urad

D. Still

slide19

STRUCT/CRYAPR Beam Loss: New O-shaped (H)

E03 and F172 collimators and xtal

Loss profiles are when crystal is

at angle for channel.

Bend angle of crystal (O-05-09) = 360 urad

Rest of the Tevatron

D. Still

vr beam at f172h collimators
VR Beam at F172H Collimators

VR Beam should be

~ .9mm from core

For ~ VR angle of 16urad.

Result of ring orbit for 16urad

Kick simulating effect of VR kick.

D. Still

slide22

November 2, 2007 A.Drozhdin

At E03H Collimator

At F172H Collimator

AM

VR

CH

VR

AM

CH

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).

e03h collimator scan data
E03H collimator scan data

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

f172h collimator scan data
F172H collimator scan data

E03H collimator is at “Max Catch” position = 260 mils

D. Still

finding vr beam at f17
Finding VR beam at F17

Maybe Collimated VR beam

Displacement difference

~ 45 mils or 1.125 mm

F172H scan w/ angle at channel

-970urad.

F172H scan w/ angle at VR

-882urad

D. Still

another look at collimated vr beam at f172h at different vr angle
Another look at Collimated VR beam at F172H at different VR angle.

Crystal angle in VR region

E0CCA2 = -914urad

Crystal angle in CHANNEL region E0CCA2 = -971urad

D. Still

vr present when there is channeled beam
VR present when there is channeled beam

CH

AM

VR

These simulations are with the crystal placed at 5s

Simulations predict that when the crystal angle is set to channel

there is also scattered and VR present.

D. Still

ring losses for channel vs amorphous angles
Ring Losses for channel vs. amorphous angles

Maybe argue there is more local loss?? tough

Crystal angle set in amorphous region

Crystal angle set to channel = -970urad

D. Still

f17 instrumentation abort gap loss
F17 Instrumentation – Abort Gap Loss

F1 abort gap losses

RF station 5 tripping causing more losses in abort gap

E1 abort gap losses

D. Still

f17 instrumentation bunch loss
F17 Instrumentation – Bunch Loss

F1 bunch loss

E1 bunch loss

D. Still

additional detector hooked up
Additional detector hooked up

Todd hooked this paddle

yesterday and it is getting

database entries and should be

available soon.

This should be equivalent to

the LE0PIN and hopefully

more sensitive.

D. Still

h4 mvr in a single crystal i
H4 – MVR in a single crystal I

Under proper axial alignement VR from main and skew planes collapse in MVR in a single crystal

D. Still

what should next eos contain
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?

D. Still