HRRL OTR Test Mar 3rd 2011

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Preparation

JAI Camera Setup

Target in:

HRRL OTR Test Mar 3rd 2011 JAI Camera Setup 1.jpg HRRL OTR Test Mar 3rd 2011 JAI Camera Setup 2.jpg


Target out:

HRRL OTR Test Mar 3rd 2011 JAI Camera Setup Target Out 1.jpg


Target in after shielded:

HRRL OTR Test Mar 3rd 2011 JAI Camera Setup shielded target in 1.jpg

Objectives

Determined if the steering magnets of the gun are connected to power supply

1. Physically check looking at wires.

2. Change currents on the steering magnet, and observe position of the beam spot. If changes then, connected.

Tune beam using Linac optics only

Chad will tune up the beam using steering elements which are within the HRRL Linac only.

Determined if the OTR target is centered on the beam line

With all beam line magnets off, observe the beam spot at the OTR target. If the beam is centered on the OTR target, then OTR target MAY be centered on the beam line.

Polarization test

Insert a polarizer film. Take several picture for different orientations without changing beam properties.

Angel is measured with respect to:

Polarizer Angel Iamge
200 px 200 px

Determined if the quads are centered on the beam line

The power supplies for ALL quads should be off.

Turn on Quad closesst to HRRL

If the beam deflects, try to align quad so there is no deflection

Turn on Quad closest to OTR target

If the beam deflects, try to align quad so there is no deflection


Run

Field Emission Check

Peak Current (mA): 160

Rep Rate (Hz): 6

Pulse width (ns): 200

HV on, Filament on, RF on

HRRL Test Mar 3rd 2001 FIled Emission Cehck HV on Filament on RF on.jpg

HV off, Filament on, RF on

HRRL Test Mar 3rd 2001 FIled Emission Cehck HV off Filament on RF on.jpg

HV off, Filament on, RF off

HRRL Test Mar 3rd 2001 FIled Emission Cehck HV off Filament on RF off.jpg

HV on, Filament on, RF off

HRRL Test Mar 3rd 2001 FIled Emission Cehck HV on Filament on RF off.jpg



HV on, Filament on, RF on, Valve closed

HRRL Test Mar 3rd 2001 FIled Emission Cehck HV on Filament on RF on valve closed.jpg

HV off, Filament on, RF on, Valve closed

HRRL Test Mar 3rd 2001 FIled Emission Cehck HV off Filament on RF on valve closed.jpg

HV on, Filament on, RF off, Valve closed

HRRL Test Mar 3rd 2001 FIled Emission Cehck HV on Filament on RF off valve closed.jpg

HV off, Filament on, RF off, Valve closed

HRRL Test Mar 3rd 2001 FIled Emission Cehck HV off Filament on RF off valve closed.jpg

Estimation of How Much off

Rep Rate (Hz): 6

Pulse width (ns): 200

Take at least 3 images for each setting below.

The goal is to estimate how far things may be misaligned. Several assumption will be made.

Tuned for Max transmision to FC Just by steering Magnets

Peak Current (mA): 160


HRRL OTR Test Mar 3rd 2011Tuned for Max transmision to FC Just by steering Magnets.jpg

Tuned for Max transmision to FC by using quads and steering Magnets

Using 1st Triplets

Peak Current (mA): 160

HRRL OTR Test Mar 3rd 2011Tuned for Max transmision to FC by steering Magnets and quads 1st triplet.jpg


Using 2nd Triplets

Peak Current (mA): 160

HRRL OTR Test Mar 3rd 2011Tuned for Max transmision to FC by steering Magnets and quads 2nd triplet.jpg


Using Both Triplets

Peak Current (mA): 160

HRRL OTR Test Mar 3rd 2011Tuned for Max transmision to FC by steering Magnets and quads both triplet.jpg

Tuned for Min Quad deflection

Find the spot that when we change quad currents, center of the beam spot does not change or change the lest.

Rep Rate (Hz): 6

Pulse width (ns): 200

Peak Current (mA): 160

300 px

Quad current (A):

300 px

Tune on center of Target

OTR Check bu Polarization

Before moving Camera

Take pictures at different time slices from the trigger.

This means take a picture and then delay the trigger pulse to the camera relative to the RF. Perhaps the light has a time structure.


Far field

Now return the camera trigger back to the original location in time. Focus at infinity and try to observe polarization.

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