SCRF Lab and Facilities @ IHEP

Jianping Dai

On behalf of the SCRF facilities team

First Mini-Workshop on IHEP 1.3GHz Superconducting RF project,

June 10-11, 2009, IHEP, Beijing, China

1st Mini-Workshop on 1.3GHz cavity, June 10-11, Beijing jpdai@ihep.ac.cn 2

Outline

1. Brief introduction

2. Upgrade of existing facilities

3. Development of new facilities

4. Summary

1st Mini-Workshop on 1.3GHz cavity, June 10-11, Beijing jpdai@ihep.ac.cn 3

Brief introduction of SCRF Lab. @IHEP

The SCRF Lab was built in 2004. It was initially equipped with the fundamental facilities

needed by the development of single cell SCRF cavities. Since 2005, several low beta single-cell SRF cavities have

been treated and tested in this lab.

1st Mini-Workshop on 1.3GHz cavity, June 10-11, Beijing jpdai@ihep.ac.cn 4

1st: CP(100m)+HPR(2hr.)+Baking(120 48hr.) @IHEP℃ 2nd: CP(50m)+HPR(2hr.)+Baking(120 48hr.) @IHEP℃ 3rd: CP(20m)+HPR(3hr.)+Baking(120 48hr.) @IHEP℃ 4th: HPR @KEK 5th: warm up and fast cooling down @KEK

Low beta SC-02

1st Mini-Workshop on 1.3GHz cavity, June 10-11, Beijing jpdai@ihep.ac.cn 5

1st: BP(20m)+CP(80m)+Anealing+CP(80m)+HPR(1.5hr.)+Baking(120 ,48hr.) ℃@IHEP2nd: CP(100m)+HPR(2hr.)+Baking(120 48hr.) @IHEP℃3rd: Only evacuation after transfered from IHEP to KEK @KEK4th: EP(80m+3m)+HF+HPR+Baking(120 48hrs.) @KEK℃

Low beta SC-03

1st Mini-Workshop on 1.3GHz cavity, June 10-11, Beijing jpdai@ihep.ac.cn 6

Large grain Nb LL single cell cavity

0 10 20 30 40 501E8

1E9

1E10

1E11

X-ray from 22.09 MV/m

CBP(150)+CP(90)+Anealing+CP(10)+HPR+Baking@IHEPHPR(15 min.)+VT@KEK

IHEP#2 (2nd meas.)

Q0

Eacc [MV/m]

Q0 2008/02/14 Thu.

Eacc=34.72MV/m)Q0=1.49E10@2.00 KLimited by Quench

1st Mini-Workshop on 1.3GHz cavity, June 10-11, Beijing jpdai@ihep.ac.cn 7

To meet the 9-cell cavity requirement for surface preparation and vertical tests, the 1.3 GHz SCRF program will significantly improve the facilities.

Besides the upgrade of the clean room and the ultra-pure water system, several new facilities will be developed.

CBP (tumbling) machine for 9-cell cavities (ZHAI Jiyuan)

HPR facility for 9-cell cavities (LI Zhongquan)

BCP facility for 9-cell cavities (DAI Jianping)

Pretuning machine for 9-cell cavities (HOU Mi)

New dewar and related devices for vertical tests

Helium recycling system for vertical tests based on the BEPCII cryogenic plant, or a brand new vertical test stand near the horizontal test stand

T-mapping and cavity inner surface inspection tools

1st Mini-Workshop on 1.3GHz cavity, June 10-11, Beijing jpdai@ihep.ac.cn 8

Upgrade of the existing facilities (I)

The height of the roof was increased to 3.5m from 2.5m, to host the new HPR machine

All the filters were changed.AAF filter, the efficiency ≥99.9995%@0.12um

The floor was improved

1st Mini-Workshop on 1.3GHz cavity, June 10-11, Beijing jpdai@ihep.ac.cn 9

Upgrade of the existing facilities (II)

1200L

Parameters of the Ultra pure water 180.2M-cm, 8 ～ 20L/min, 1200L

1st Mini-Workshop on 1.3GHz cavity, June 10-11, Beijing jpdai@ihep.ac.cn 10

Upgrade of the existing facilities (III)

Cavity mount stage 3m×4.4m×5.2m, >4m, Three cavities

1st Mini-Workshop on 1.3GHz cavity, June 10-11, Beijing jpdai@ihep.ac.cn 11

Development of the new facilities (I)CBP (tumbling) machine for 9-cell cavities is under fabrication.

Old CBP machine for single cell cavities

1st Mini-Workshop on 1.3GHz cavity, June 10-11, Beijing jpdai@ihep.ac.cn 12

Development of the new facilities (II)

The new HPR machine for 9-cell cavities is under design.

Old HPR machine for single cell cavities

Fermilab HPR （ ANL）

Water Pressure :adjustable150Kg/cm2 (Max)，Maximu Flow: 21L/min

1st Mini-Workshop on 1.3GHz cavity, June 10-11, Beijing jpdai@ihep.ac.cn 13

Development of the new facilities (III)Old BCP by hand for single cell cavities

1st Mini-Workshop on 1.3GHz cavity, June 10-11, Beijing jpdai@ihep.ac.cn 14

New BCP for 9-cell cavities

Over flow Tank

Recirculation Pump

WaterChiller

Main Acid Valve

AcidTank

Main Acid Pump

AcidSupply Tank

Acid Dump Tank

Acid Dump Valve

Acid Waste Barrel

Acid Dump Pump

Waste Gas Treatment

Dilute WasteBarrel

UPWTank

UPWPump

Ultra Pure Water (UPW)Barrel

UPWValve

Dilute Waste Valve

Main parameters of the machine It takes a bout 2 hours to cool acid down to 12 OC It takes 5-10 minutes to pump 100 liters of acid into the gravity feed bank. It takes less than 1 minute to fill or discharge the 100 liter process tank. The cooling system can remove up to 2KW of heat generated during the process (the expected normal power generation does not exceed 1kW) The maximum acid flow is ~2 tons/hour

Hydrofluoric (HF), Nitric(HNO3), Orthophosphoric (H3PO4)

1st Mini-Workshop on 1.3GHz cavity, June 10-11, Beijing jpdai@ihep.ac.cn 15

一层

酸排放槽 废酸储槽

清洗排放水槽

铌化铣装置

配酸槽 高位水槽高位酸槽 酸雾塔纯水储槽

冷水机

3#风机液位控制槽

废酸储槽

泵泵

泵泵

排酸 排酸冷却器

1st Mini-Workshop on 1.3GHz cavity, June 10-11, Beijing jpdai@ihep.ac.cn 16

Development of the new facilities (IV)

Pretuning machine for 9-cell cavities

Longitudinal precision: 2um

Maximum force: 10KN （ 1000Kgf）Maximum movement: 6mm

Minimum movement: 2um

1st Mini-Workshop on 1.3GHz cavity, June 10-11, Beijing jpdai@ihep.ac.cn 17

1st Mini-Workshop on 1.3GHz cavity, June 10-11, Beijing jpdai@ihep.ac.cn 18STF 18

About the Kyoto camera system (Mass-production model)

Characteristic of Kyoto camera system

* The high resolution image can be taken.

* The wall gradients of inner surface can be

measured to use the Strip line EL illuminator.

(Judgment of Pit or Bump is possible)

* The heights or depths can be estimated by measured wall gradients for some well-conditioned defects.

Max wall gradient

±20 degree.

Schematic drawing of the wall gradient measurement

1st Mini-Workshop on 1.3GHz cavity, June 10-11, Beijing jpdai@ihep.ac.cn 19

Thanks !