Advisors Dr. Liguang Tang (tangl) Dr. Dave Mack (mack/) for the beam modulation team Nuruzzaman...

AdvisorsDr. Liguang Tang

(http://www.jlab.org/~tangl)

Dr. Dave Mack(http://www.jlab.org/~mack/)

for the beam modulation team

Nuruzzaman

(http://www.jlab.org/~nur/)

Collaboration Meeting18th September 2010

An Update on Beam Modulation

for the Qpweak

Experiment

Overview

OPTIM Simulation

Hardware Issues

Diagnostics

Analysis

Future Plans

Optics Changed – August Current

OPTIM Simulation Hardware Issues Diagnostics Analysis Future Plans

3

Upcoming Fall Run Prediction

4


Upcoming Run Currents

Beam Parameter

Modulation Amplitude

Current through 1st Coil I1

(A)

Field Integrals

for 1st CoilBdL1 (G-cm)

Current through

2nd Coil I2 (A)

Field Integrals

for 2nd Coil

BdL2 (G-cm)

Tune Parameters

(BdL2 / BdL1)

X 250 μm 0.16 52 -0.30 -99 -1.885

X΄ 4 μrad 0.078 26 -0.30 -99 -3.808

Y 160 μm -0.30 -99 0.11 36 -0.364

Y΄ 3μrad -0.30 -99 0.25 84 -0.848

N.B: Assuming 1 A= 330 G-cm

Calculation scaled to move beam by X= 250μm, X´= 4μrad, Y= 160 μm and Y´= 3μrad

5


Beamline

CoilsX1

Y1

Y2

X2

SRFE

BSY Service Building

BMOD1

X1Y1X2Y2

LEMCurrent

Transducer

X1

Y1

Y2

X2

TRIM-IPower Amp.

BPMs

BMOD2

Hall-C

GUI

CONSOLE

Qpweak PV

Daq.Qpweak Cage

IOChCnmr

TRIUMF

ADC

JLAB

ADC

Hardware Sketch

6


0.015 V 1.65 G-cm=

DC Shift Due to Relay

7


Predicted Effect from OPTIM for DC Shift

X110 μm

Target

2ndCoil

1st Coil-10 μm

2.5 μm

IC IC

Dump

8


Edge Effect in Rampwave Signal

9


Modulation Cycle

10

Run # 5230Raster: 2x2Beam Current: 5 μATarget: OUTMain Detector: ONMode: Single Coil ModulationModulation Current: 0.06 A


Dedicated test runs for beam modulation taken during the summer are 5230-5235 on 08/09/2010

Modulation Cycle

11


Function Generator Signals

12

FG X

FG Y


Current Transducer Signals

13

LEM X

LEM Y


Response of BPM 3H09 for FGX1

14

3H09X3H09Y


Response of Main Detector for FGX1

15

+PMT-PMT


Response of Main Detector for FGX1

16

(+PMT)+ (-PMT)


Target OUT

Main Detector Sensitivity with BPM 3H09 for FGX1

17

3H09X3H09Y


Target OUT

3

7

1 5

4

6

2

8

Future Plans

•Hardware connections were checked and verified several times. Necessary corrections are being modified in software.

•Do test runs after all the corrections (with beam and without beam).

•Analyze data and verify everything is working.

•Need 2-3 hours test with beam to achieve desired tune parameters to get pure position and angle at target. (assuming beam modulation hardware, software, BPMs are in working condition)

•Extract detector sensitivities.

18


Extra

Basics OPTIM Simulation Hardware Issues Diagnostics Analysis Future Plans

19

Future Plans


20

Future Plans


21

3

7

1 5

4

6

2

8

Beamline

CoilsX1

Y1

Y2

X2

SRFE

22

BSY Service Building

BMOD1

X1Y1X2Y2

LEMCurrent

Transducer

X1

Y1

Y2

X2

TRIM-IPower Amp.

BPMs

BMOD2

Hall-C

GUI

CONSOLE

Qpweak PV

Daq.Qpweak Cage

IOChCnmr

TRIUMF

ADC

JLAB

ADC

Extra


23

Extra


24

Extra


25

Extra


26

Extra


27

Extra


28

3h09


3H09X3H09Y

29

Extra


X1

X2

07A

XY

07A

09B090807C07B07A

09B090807C07B07A

Target

cosθ sinθcosθ -sinθ

XY

07C

X

E

X´

YY´

i

X

E

X´

YY´

T

YX

07A

YX

07C

Edge Effect in Rampwave Signal


30

FG vs LEM


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Response of Combined BPM for FGX1


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Response of BPM 3H08 for FGX1


33

Main Detector Sensitivity with BPM 3H08 for FGX1


34

Main Detector Sensitivity with Combined BPM for FGX1


35

General


36

Basics


θ1

θ2

Z=0 Z=d1

Z=d2

2 1 1

1 1

(d d ) 1θ = T T

d d

2

2 1 1

d 1θ = T T

d d

m m

m m

T = X Y

T = X Y

Where

z

x / y

Forward Beamline

37

Basics


We are squeezing our function generators, etc, into a VME crate already in the BSY. We may be asked to upgrade the IOC in that crate.(All the hardware are installed for modulation)

Need to pull some cables from the BSY service building to our parity DAQ in the Qp

weak cage(All the cables are pulled and connections are checked several times)

GUI need to be tested(Its working fine)

LEM rack under construction in Accelerator Division.(Constructed and installed)

38

Basics


39

Optics Changed – August Current


1 mm

-1 mm

-1 mm

1 mm

-1 mm

1 mm

-1 mm

1 mmX X´

Y Y´

40

Upcoming Fall Run Prediction

1 mm

-1 mm

-1 mm

1 mm

-1 mm

1 mm

-1 mm

1 mmX X´

Y Y´

41


Advisors Dr. Liguang Tang (tangl) Dr. Dave Mack (mack/) for the beam modulation team Nuruzzaman...

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Transcript of Advisors Dr. Liguang Tang (tangl) Dr. Dave Mack (mack/) for the beam modulation team Nuruzzaman...