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FERMILABTD/SRFD

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Ultra-Sonic Cleaning of SRF Cavities at CPL Operating Procedure

Doc. No. OP-464196Rev. NoneDate: 3/4/2019 of 12

FERMILABTechnical Division

Superconducting Radio Frequency Development Department

CPL ULTRA-SONIC CLEANING OF SRF CAVITIES OPERATING PROCEDURE

Prepared by:

Timothy McKenna 5-30-18

Tim McKenna

OrganizationTD/PE

ExtensionX5563

Reviewed by

Andrew Penhollow5-30-18Andrew Penhollow

OrganizationTD/SRFDD.

ExtensionX3103

Approved by: OrganizationTD/SRFDD

ExtensionX2569

FERMILABTD/SRFD

Department



Damon Bice 5-30-18Damon Bice

FERMILABTD/SRFD

Department



Revision History

Revision Date Section No.

Revision Description

None 5-30-18 All Initial Release

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Department



Table of Contents

1. PURPOSE...............................................................................................................................................4

2. GENERAL AUTHORIZED PERSONNEL REQUIREMENTS.......................................................4

3. SPECIFIC TASK RELATED TRAINING REQUIREMENTS........................................................4

4. RECORDS...............................................................................................................................................4

5. U.S. CLEANING SYSTEM BACKGROUND INFORMATION……………………………………………………………...……...………….…….4

6. ULTRA SONIC CLEANING SYSTEM OPERATING PROCEDURE..........................................5

7. APPENDIX A: ULTRA SONIC CLEANING SYSTEM MAINTENANCE RECORD.................7

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1. PURPOSE

1.1. This document describes the procedure to operate the Stoelting ultra sonic cleaning and rinse systems located in IB4 as part of the Cavity Processing Lab (CPL)

2. GENERAL AUTHORIZED PERSONNEL REQUIREMENTS

2.1 Operating the CPL ultra-sonic cleaning system is restricted to personnel who have been authorized per OP-464205. (Procedure to Authorize Personnel to Operate the CPL Ultra-Sonic Cleaner)

2.2 Review the following document with the CPL Responsible Engineer: “Procedure to Authorize Personnel to Operate the SCPL Ultra-Sonic Cleaner ”, OP-464205, A. Rowe

.3. SPECIFIC TASK RELATED TRAINING REQUIREMENTS

3.1 Operators must demonstrate competent operational skill in the presence of a trained operator to be considered trained.

4. RECORDS

4.1 The Stoelting ultra sonic cleaner tank Maintenance Log is shown in Appendix A. The paper copy located in the CPL cleanroom area is to be completed at each maintenance interval or with each maintenance activity. Maintenance activities will also be recorded in the ILC ELog found here:

http://dbweb2.fnal.gov:8109/ilc/Index.jsp

5. U.S. CLEANING SYSTEM BACKGROUND INFORMATION

5.1 Clean D.I. water is treated ultrasonically and used to remove grease, oil, and other contamination from niobium radio frequency (RF) cavities interior and exterior surfaces. The rinse tank is used to removes residual detergent post ultra sonic cleaning. Ultra sonic cleaning of RF cavities using ultrapure water is a fundamental surface processing technique used to remove surface contamination before cavities are deemed suitable for introduction into the cleanroom.

5.2 The CPL ultra sonic cleaning system will be used primarily as a device following surface removal R&D and production processing on SRF cavities and before a cavity is introduced into the cleanroom for HPR or other activities. The U.S. tank’s DI water uses heat, detergent, and ultra sonics to remove contamination of both interior and exterior surfaces

.

http://dbweb2.fnal.gov:8109/ilc/Index.jsp

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Department



6. U.S. CLEANING SYSTEM OPERATING PROCEDURE

6.0.1 WARNING: Disable ultra sonics, heat, and recirculation pump with the key switch located on the front of the holding tank. Whenever working on or maintaining the ultra sonic’s tool or configuring the water system, exercise standard LOTO procedures.

WARNING: During normal operation, the water inside the u.s. tank reaches temperatures of 120F.

6.0.2 Personal Protective EquipmentAdhere to all area specified PPE requirements

6.0.3 Emergency Response1. For immediate shutdown of ultra sonic cleaning System, press

Emergency Stop button located on system electrical panel outside of the cleanroom.

2. For emergency responders, dial x3131 from any FNAL phone.

6.1. Initial Startup of Ultra Sonic Cleaner Following Installation or Maintenance6.1.1. Remove LOTO devices and engage circuit interrupts if necessary.

6.1.2. Check Valve at distribution pump to ensure it’s in the open position.

6.1.2.1. See Appendix B for configurations

WARNING: Running distribution pump void of fluids will cause

premature failure of pump!

6.1.3. Thoroughly clean and rinse the inside of both tanks.

6.1.4. Lower lids to prevent debris from entering tank.

6.2. Normal Operation Sequence

6.2.1. Ensure valve to recirculation pump is in the “open” position


6.2.2. Turn main switch located on control panel to “on” position

6.2.3. Set desired ultra sonic run time on analog time counter

6.2.4. Set desired water temperature on digital read out.

6.2.5. Don appropriate gowning and enter anteroom.

6.2.6. Ensure key switch located on front panel is in the “off” position

6.2.7. Ensure drain valve located at bottom of tank is in the closed position.

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Department




6.2.8. Using DI hose located near tank, fill tank with water until level is just

below the tank overflow.

6.2.8.1. Level switch must be fully immersed in water for proper operation

6.2.9. Turn key switch on tank’s front to “on” position.

6.2.9.1. This will engage heat and recirculation pump.

6.2.10. Allow water temperature to reach set temperature

6.2.10.1. Temperature can be monitored by digital display next to set

temperature located on control panel.

6.2.11. Ensure cavity to be ultra sonically cleaned is prepared for cleaning in a

four bar frame and in the vertical position on cavity movement cart if

necessary.

6.2.12. Using overhead crane, raise cavity to height required to clear top of ultra

sonic tank and lower into tank

6.2.13. Once cavity is fully immersed, move switch located on front of tank to

“auto”

6.2.13.1. Ultra sonic transducers should now be running

6.2.14. Upon completion of set cycle length, open drain valve at bottom of tank

6.2.14.1 See Appendix B for configurations

6.2.15. Using rinse hose, thoroughly rinse cavity as water drains, ensuring that detergent does not dry on cavity surface.

6.2.16. Once cavity is fully rinsed inside and out, raise crane and move cavity to rinse tank.

6.2.17. If necessary, fill rinse tank.


6.2.18. Lower cavity into rinse tank

6.2.19. Using DI water hose, rinse cavity from top to bottom very thoroughly.

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7. APPENDIX A: ULTRA SONIC CLEANING SYSTEM MAINTENANCE RECORD

The following maintenance activities will be logged in the form below and on the ILC ELog.

Activity FrequencyFilter replacement Every 6 monthsVisual inspection Daily

Maintenance Activity Name Date

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8. APPENDIX B: CPL ULTRA SONIC CLEANING AND RINSE TANK CONFIGURATIONS

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