Cavity Database Status

J. Kerby with thanks to the Cavity Database TeamMLSCRF Webex

9 Dec 2009

Motivation• Common data sample, well defined data cuts

– Everyone uses the same data to make plots – a common denominator in yield calculations

– Data cuts can be easily specified, and anyone could reproduce your results• Data entry rules for reliable and reproducible results

– All RF tests from the last couple of years are included; may be flagged for exclusion

– Uniform criteria for data entry: only allowed values for as many as possible items– Define everything which might vary or have underlying subtleties, e.g., “LABX#1"

might be a final surface treatment referenced as a well-defined recipe anyone can look up

– No private/sensitive vendor data– Anything referred to in a comment field must be for information only, and not data

selection purposes– Minimize effort required for compliance– Provide regular updates at predetermined (by Akira) times

Original Plan FALC meeting July 13, 2009

– Provide an example plot of production yield, citing caveats (whatever they are at the time)

• Using preliminary and incomplete data for past 2-3 years from the simple Excel spreadsheet format, no web interface

– Provide the people list, and the plan End July 2009: Determine whether DESY DB is viable option, and timescale for

implementation• ALCPG/GDE Sept. 28 - Oct. 2, 2009

Dataset is web-based (thanks to support by DESY)– Some well-checked, easily explainable, and near-final plots available for

discussion such as• Production yield

Qualified vendors New vendors

Process yield Time evolution of some quantities

• End Nov. 2009: With colleagues’ input, finalize DB tool, web interface, standard plots, possibly with longer-term tool improvement plans

• NOW: Production 4 included; DB tool in Beta test; final cross checks of data; development of plotting routines underway

• Production of Chapter 4 Fig 4.1.1 this week; 4.1.2(?) as well but not from same source (needs to be fixed longer term)

Electropolished 9-cell cavities

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JLab/DESY (combined) up-to-second successful test of cavities from qualified vendors - ACCEL+ZANON (26 cavities)

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JLab/DESY (combined) first successful test of cavities from qualified vendors - ACCEL+ZANON (31 cavities)

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Compare 1st and 2nd pass yields, qualified vendors

1st pass

2nd passimprovement

degradation

yield is improved after 2nd pass

As presented at AD&I; 4 Dec cross checks showed two Prod 4 cavities w/o 120 C bake that should be removed

New Vendors: MHI and AES

• Performance of first cavities was poor – now improving!• First four from each vendor produced differently, therefore start

including starting from number 5

New Vendor Improvement: First successful testElectropolished 9-cell cavities

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JLab/DESY (combined) first successful test of cavities from qualified vendors - ACCEL+ZANON (31 cavities)

New Vendors (AES+MHI) - 18 cavities

7

Compare first-pass of new/established vendors

As presented at AD&I; 4 Dec cross checks showed two Prod 4 cavities w/o 120 C bake that should be removed

Summary• Database team has done an excellent job executing their

plan – C.M.Ginsburg, R. Geng, S. Aderhold, K. Yamamoto, Z. Conway– Important support from D. Gall, V. Gubarev, S. Yasar & DESY

Mgmt

• Database expected to be ‘on-line’ in the next couple of weeks

• For SB2009 two separate plots will be generated and inserted side-by-side: 1st pass and 2nd pass production yields, including Accel/RI, Zanon, and AES5-9 (include those DESY production 4 cavities with "standard-EP." MHI cavities will not be included.

• Further development of interfaces towards a ‘standard’ set of plots