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Straw Material Plans. Reminder: Excell XG 532 no longer prime candidate as metal adhesion to PET was poor. Fraunhofer are investigating samples to better understand the problem. Poor sputtering. Aging of the PET !. Visit to Fraunhofer A visit to Fraunhofer FEP ( Dresden ) was organised.

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straw material plans
Straw Material Plans

Neil Dixon PH/DT CERN 17/05/10

slide2
Reminder:
  • Excell XG 532 no longer prime candidate as metal adhesion to PET was poor.
  • Fraunhofer are investigating samples to better understand the problem.
    • Poor sputtering.
    • Aging of the PET !

Neil Dixon PH/DT CERN 17/05/10

slide3
Visit to Fraunhofer

A visit to Fraunhofer FEP ( Dresden ) was organised.

Fraunhofer are the specialist institute for sputtering.

Dates for the next runs have been proposed.

June and July, for test runs with samples supplied by CERN.

Visit report:

https://edms.cern.ch/document/1075080/1

Neil Dixon PH/DT CERN 17/05/10

status

Material selection :

Hostaphan GN 4600 Mitsubishi No longer available

Hostaphan GN 4660 Mitsubishi No longer available

Hostaphan RNK 2600 Mitsubishi Poor epoxy adhesion

Excell XG 532 Toray Saehan Poor metal adhesion

Melinex 406 Dupont Metal adhesion to be improved

Hi-Fi PMX 726 Hi-Fi Being tested

Results of all tests are stored on EDMS:

https://edms.cern.ch/document/1073254/1

Status :

Neil Dixon PH/DT CERN 17/05/10

material qualification tests

Sputtering at CERN and Fraunhofer

Epoxy bonding

Peel test

Ultrasonic welding in JINR

Tensile tests of welded seem

Permeation tests

XPS analysis

EM electromicroscope analysis

Material qualification tests :

Neil Dixon PH/DT CERN 17/05/10

plasma blaster

To increase our choice of PET materials, we are investigating a method to improve the bond between the PET and PEI parts of the detector.

Results of these tests will be available this week.

Other methods are considered.

Plasma Blaster :

Neil Dixon PH/DT CERN 17/05/10

plans

- Purchase and coating by Fraunhofer of one or

two sample rolls in June 2010.

- Testing and CERN and JINR.

- Preparation of another roll for July,

this option will be used depending on results from the June run.

Plans :

Neil Dixon PH/DT CERN 17/05/10

conclusion

Progress is difficult.

TE/VSC D. Letant-Delrieux, M. Taborelli, W. Vollenberg.

EN/MME M. Scheubel, S. Sgobba

PH/DT H. Danielsson, N. Dixon

JINR S. Movchan.

FP/PI D. Gregorio. (purchasing)

Conclusion:

Neil Dixon PH/DT CERN 17/05/10

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