Collaboration of TE-VSC-SCC with straw-material working

group NA62

Wil Vollenberg and Delphine Letant-Delrieux

TE-VSC-SCCNA62 straw working group meeting; 18-10-2010

W.V. & D.L.D.

- Coating adherence tests - Permeation results- Surface analysis results

NA62 straw working group meeting; W.V. & D.L.D.

SAMPLES FROM: Pilot coating run by FEP:- Melinex 406; Cu50/AU20: CO2010-07-07A-01- Melinex 406; Cu100/AU20: CO2010-07-07A-02- Hostaphan RNK 2600; Cu50/AU20: CO2010-07-08A-

01- Hostaphan RNK 2600; Cu100/AU20: CO2010-07-

08A-02

Coating adherence test at FEP by cross cut test:

Cross cut: 11*11 cutsCalibrated scotch on itPullPercentage of squares that peels off.

NA62 straw working group meeting; W.V. & D.L.D.

Adherence tests at CERN:cross test and scotch test

HostaphanRNK 2600

50 Cu + 20 Au 100 Cu + 20 Au

NA62 straw working group meeting; W.V. & D.L.D.

Adherence tests at CERN:cross test and scotch test

MELINEX 406

50 Cu + 20 Au 100 Cu + 20 Au

NA62 straw working group meeting; W.V. & D.L.D.

Items not yet understood:Adherence problems at PEF for Melinex 50 + 20, at CERN Melinex 100 + 20.

50 Cu + 20 Au 100 Cu + 20 Au

AT CERN: Aging of samples:Melinex 100 + 20: better adherence after aging ??

Tests of aging in controlled conditions:

NA62 straw working group meeting; W.V. & D.L.D.

Adherence tests at CERN:scotch test

Hostaphan RNK 2600 50 Cu + 20 Au

Melinex 406 50 Cu + 20 Au

NA62 straw working group meeting; W.V. & D.L.D.

Items not yet understood:Good adherence for Coatings on Hostaphan RNK 2600, independent of thickness / aging conditions

Some unexpected results for adherence of coatings on Melinex 406.

Permeation results

NA62 straw working group meeting; W.V. & D.L.D.

He Ar CO200

01

02

03

04

05

06

07

Hostaphan RNK 2600 naked CA1509465

P x

10

-12

[T

orr

.l.c

m/s

.cm

2.T

orr

]

BIFHe=35BIFAr=(?) BIFCO2=35

Surface analysis results (XPS)

NA62 straw working group meeting; W.V. & D.L.D.

Uncoated samples coming from rolls coated by Fraunhofer (CA1509465)

Future activities

• Permeation (Ar and CO2) determination of:Hostaphan RNK 2600 Cu100/Au20

(ongoing)Hostaphan RNK 2600 with welding

NA62 straw working group meeting; W.V. & D.L.D.