beam position noise from 500 kev mbo0i06 dipole sensor

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Beam Position Noise from 500 keV MBO0I06 Dipole Sensor May 13, 2009

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Beam Position Noise from 500 keV MBO0I06 Dipole Sensor. May 13, 2009. Beam Position Noise. The Sensor was installed as part of the Segmented Injector PSS system in early Summer 2006 500 keV Dipole Current Sensor moves beam at frequency other than 60 Hz; about 80 Hz - PowerPoint PPT Presentation

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Page 1: Beam Position Noise from 500 keV MBO0I06 Dipole Sensor

Beam Position Noise from 500 keV MBO0I06

Dipole Sensor

May 13, 2009

Page 2: Beam Position Noise from 500 keV MBO0I06 Dipole Sensor

The Sensor was installed as part of the Segmented Injector PSS system in early Summer 2006

500 keV Dipole Current Sensor moves beam at frequency other than 60 Hz; about 80 Hz

This is the major source of beam position noise in Injector. 60 Hz line noise sources have been reduced

This noise makes measuring helicity correlated position differences far less accurate; increases the width of position differences. Same for charge asymmetry if there is scrapping in the accelerator

How does it affect the physics program?

1. 30 Hz Helicity Reversal is designed to cancel 60 Hz line noise; Sensor noise will not cancel completely

2. 240 Hz Helicity Reversal for PREx; most sensitive3. Qweak at 1 kHz is also sensitive but less than 240 Hz Helicity Reversal

Fine for HAPPEx III and PVDIS. Fix by March 1st , 2010

Beam Position Noise

Page 3: Beam Position Noise from 500 keV MBO0I06 Dipole Sensor

Sensor

ON

Sensor

ON

Sensor

OFFP

SS

Dip

ole

Mag

net

Page 4: Beam Position Noise from 500 keV MBO0I06 Dipole Sensor

Sensor

ON

Sensor

ON

Sensor

OFFP

SS

Dip

ole

Mag

net

Page 5: Beam Position Noise from 500 keV MBO0I06 Dipole Sensor

1 kHz

250 Hz

30 Hz

PS

S D

ipo

le M

agn

et

Page 6: Beam Position Noise from 500 keV MBO0I06 Dipole Sensor

1 kHz

250 Hz

30 Hz

PS

S D

ipo

le M

agn

et

Page 7: Beam Position Noise from 500 keV MBO0I06 Dipole Sensor

30 Hz

Page 8: Beam Position Noise from 500 keV MBO0I06 Dipole Sensor

250 Hz

Page 9: Beam Position Noise from 500 keV MBO0I06 Dipole Sensor

1 kHz

Page 10: Beam Position Noise from 500 keV MBO0I06 Dipole Sensor

30 Hz

Page 11: Beam Position Noise from 500 keV MBO0I06 Dipole Sensor

250 Hz

Page 12: Beam Position Noise from 500 keV MBO0I06 Dipole Sensor

1 kHz

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