operating procedure · web view4.1. place temporary magnetic shielding on the neck of the...

TD / Process Engineering Specification # 5520-OP-4644031/ 22, 2018Rev. None

Fermi National Accelerator LaboratoryBatavia, IL 60510

Shipping Gauge Magnet Installation and Removal for LCLS-II Cryomodules

FermilabTechnical Division

Date Organization ExtensionPrepared by: Timothy McKenna

1-22-18 TD/PE X5563

Reviewed by: Genfa Wu

1-22-18 TD/SRFDD X3091

Reviewed by: Approved by: Saravan Chandrasekaran

1-22-18 TD/SRFDD X8260

Shipping Gauge Magnet Installation and Removal for LCLS-II Cryomodules of 10


Revision Page

Revision Step No. Revision Description DateNone N/A Initial Release 1/22/18



Table of Contents

1.0 Purpose

2.0 Equipment/Materials

3.0 Outside Cleanroom

4.0 Install at FNAL/JLAB on Cryomodule post cleanroom procedures

5.0 Removal at SLAC



1.0 Purpose

This procedure should be used for both the installation of the shipping gauge magnet at Fermilab (FNAL) and Jefferson LAB (JLAB) and the removal of the shipping gauge magnet at SLAC.

This procedure does NOT cover the steps for cleanroom assembly of the end beam pipe manifold (without the magnet or electronics unit), or installation of end beam pipe manifold (without the magnet or electronics unit) on the cryomodules.

2.0 Equipment/Materials

Picture taken from Pfeiffer Vacuum PKR 261 Compact Full Range Gauge manual.

1: Socket head set screw.2: Electronics unit.3: Hex head bolt.4: Magnet.7: Gauge body with con-flat flange.

Tools needed for disassembly:1.5 mm allen wrench7 mm box wrench



3.0 Outside Cleanroom

3.1. Remove electronics

a. Loosen set screw on side of electronics using 1.5mm Allen wrench.b. Remove electronics by slowly sliding out the package.

NOTE: DO NOT TWIST OR ROTATE WHILE REMOVING.

3.2. Remove magnet

a. Loosen bolt on bottom of magnet using a 7mm wrench.NOTE: Using the box end of the wrench makes loosening easier. Use a non-magnetic wrench if possible.

3.3. Store magnet and electronics in a safe location, away from any Cryomodule components.

3.4. Demagnetize gauge body and hardware in the kit.

3.5. Demagnetize any tools used and/or keep the tools isolated.

NOTE: At this point, cleanroom assembly of the end beam pipe manifold (without the magnet or electronics unit) is performed. The installation of the end beam pipe manifold (without the magnet or electronics unit) on the cryomodules occurs next. The steps for these two activities are not covered in this procedure.

4.0 Install at FNAL/JLAB on Cryomodule post cleanroom procedures

4.1. Place temporary magnetic shielding on the neck of the manifold, between the gate valve and shipping

gauges.

4.2. Install magnet

a. Hold magnet with bolt towards the flange of the gauge body.b. Slide the magnet down. If the hold-down piece gets stuck while sliding the magnet in place,

loosen the bolt more (but do not remove the bolt), place the 1.5 mm Allen wrench between the bolt and piece and push as necessary.



c. Tighten bolt to secure magnet.

4.3. Install electronics

a. Line up the pin sticking out of the gauge body with the recess in electronics.



b. Slide the electronics on.

c. Screw in the set screw and secure the electronics.

4.4. Install steel magnetic shield.

a. Place the two halves of the steel magnetic shield around the gauge.



b. Place two hose clamps, one towards the bottom and one towards the top of the steel shield, and screw down to secure the shield.

4.5. Install the second steel magnetic shield and remove the temporary magnetic shield.

5.0 Removal at SLAC

5.1. Place a temporary magnetic shielding on the neck of the manifold, between the gate valve and shipping

gauges.

5.2. Remove steel magnetic shield.

a. Loosen and remove the two hose clamps.



b. Remove the two halves of steel magnetic shield.

5.3. Remove electronics

a. Loosen set screw on the side of electronics using a 1.5 mm Allen wrench.

b. Remove electronics by slowly sliding out the package.



NOTE: DO NOT TWIST OR ROTATE WHILE REMOVING.

5.4. Remove magnet

a. Loosen the bolt on the bottom of the magnet using a 7 mm wrench.

NOTE: Using the box end of the wrench makes loosening easier. Use a non-magnetic wrench if possible.

b. Store the magnet and electronics in a safe location, away from any Cryomodule components.

5.5. Ship the manifold with the magnet, electronics and steel magnetic shield to partner labs.

a. The magnet, electronics and steel shield may be installed on the manifold.


operating procedure · web view4.1. place temporary magnetic shielding on the neck of the...

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