1. Upgrading the Data Processing for the Vacuum Furnaces Jennifer Case Northern Illinois University Mechanical Engineering Supervisor: Mayling Wong Technical Division Cavity Processing Department SIST Program August 8, 2012

2. Outline Superconducting Radio Frequency (SRF) cavity background Objectives LabVIEW Excel Macros Conclusion

3. Superconducting Radio Frequency (SRF) Cavities Made of Niobium Used in accelerators High Quality Factor, Q – Measure of Superconducting efficiency – Surface defects Processed on-site http://www.bruker- est.com/typo3temp/pics/3d9c2213f8.jpg

4. Processing of SRF Cavities Centrifugal Barrel Polishing Electropolishing High Pressure Rinse Vacuum Furnaces – Hydrogen degassing (improves Q) – Cleanliness of the bakes checked from output data Vacuum Furnace When production starts, 2-3 cavities will be baked per week per furnace 4-6 cavities will be baked per week

5. Residual Gas Analyzer (RGA) http://www.thinksrs.com/pro ducts/RGA.htm H2OH2O H2H2 N2N2 O2O2 Ar CO 2 Pressure (torr) AMUs Can indicate dirt

6. Programmable Logic Controller (PLC) Controls the furnace Collects data on temperature and pressure inside the furnace Collects data from thermocouples in the furnace http://ab.rockwellautomation.com/Progra mmable-Controllers/SLC-500

7. Old Data Processing Procedure RGA collects about every minute PLC collects every 10 seconds Bake in Furnace (1-3 days) PLC RGA SRS LabVIEW Program Database File (.dbf) Log File (.txt) Excel Bake ChartProcess ChartSpectrum Chart One hour later

8. RGA PLC

11. Bake in Furnace (1-3 days) PLC RGA LabVIEW Program Log File (.txt) Excel Macros Bake ChartProcess ChartSpectrum Chart Objectives Excel Bake Chart

12. LabVIEW Program 1 2 3 4 6 5 2 18 28 32 40 44

13. LabVIEW: Analog Front Panels Original SRS Program New Program

14. LabVIEW: Analog Block Diagram Same Case Structure Original SRS Program New Program

15. Adding the Graph Complete Scan Total?

16. LabVIEW: PLC Communication Deallocates memory Chamber Temperature Thermocouple Temperatures Chamber Pressure

17. LabVIEW Results

18. Excel Macros Format data Create process chart Create/add to bake chart Create/add to spectrum chart Add Rate of Rise 8 Macros:

19. Excel Macros Results After Minor FormattingFrom Macro

20. Excel Macros Results New data for AMU 67

21. Conclusion Reduced data processing from about an hour to about 5 minutes: Faster results – Needed if imperfections are found More time to analyze data

22. Acknowledgements Mayling Wong Nathan Bremer Allan Rowe Diane Engram Linda Diepholz Dave Peterson Elmie Peoples Luciano Elementi James Davenport Member of the SIST committee

23. Questions?