Neil Dixon PH/DT Neil Dixon PH/DT CERN 22/03/ CERN 22/03/1010

Straw Material PlansStraw Material Plans

• Latest news.Latest news.

Many tests ongoing at CERN and in JINRMany tests ongoing at CERN and in JINR

in and attempt to validate in and attempt to validate

Excell 532 as quickly as possibleExcell 532 as quickly as possible..

Neil Dixon PH/DT Neil Dixon PH/DT CERN 22/03/ CERN 22/03/1010

Base materialBase material

PET (Polyethylene terephthalate) (PET (Polyethylene terephthalate) (CC1010HH88OO44)n)n

• Excell 532 is the current preferred PET, and is been tested Excell 532 is the current preferred PET, and is been tested • We have a back up candidate. (Melinex from DuPont)We have a back up candidate. (Melinex from DuPont)

Team involved in sourcing, qualification and validation:Team involved in sourcing, qualification and validation:

TE/VSC TE/VSC D. Letant-Delrieux, M. Taborelli, W.Vollenberg.D. Letant-Delrieux, M. Taborelli, W.Vollenberg.EN/MME EN/MME M. Scheubel, S. SgobbaM. Scheubel, S. SgobbaJINR JINR S.MovchanS.MovchanPH/DTPH/DT H. Danielsson, N. DixonH. Danielsson, N. Dixon

Neil Dixon PH/DT Neil Dixon PH/DT CERN 22/03/ CERN 22/03/1010

Material specifications Material specifications (reminder)(reminder)

PET (Polyethylene terephthalate) (PET (Polyethylene terephthalate) (CC1010HH88OO44)n)n

The thickness of the material is 36 micrometers +/- 2 The thickness of the material is 36 micrometers +/- 2 µmµm

Tensile strength should be as the close to 180 N/mm² ( MD )Tensile strength should be as the close to 180 N/mm² ( MD )

230 230 N/mm² ( TD )N/mm² ( TD )

Density Density 1.4 g/cm 1.4 g/cm³³

Good permeation properties. Better than 100 cm³/m²/day/bar.Good permeation properties. Better than 100 cm³/m²/day/bar.

Can be welded by ultrasound.Can be welded by ultrasound.

Good metal adherence / coating properties.Good metal adherence / coating properties.

Good adhesion properties with epoxy.Good adhesion properties with epoxy.

Neil Dixon PH/DT Neil Dixon PH/DT CERN 22/03/ CERN 22/03/1010

Variables :Variables :

PET is available as single, or double side treated.PET is available as single, or double side treated.

Coating thickness Cu / Au can be optimised to suit our requirements.Coating thickness Cu / Au can be optimised to suit our requirements.

Neil Dixon PH/DT Neil Dixon PH/DT CERN 22/03/ CERN 22/03/1010

Ongoing tests :Ongoing tests :

Permeation (+XPS).Permeation (+XPS).

Microscope observation and analysis.Microscope observation and analysis.

Welding tests in JINR.Welding tests in JINR.

Mechanical (Peel test, long term effects of tension on straw tubes)Mechanical (Peel test, long term effects of tension on straw tubes).

Neil Dixon PH/DT Neil Dixon PH/DT CERN 22/03/ CERN 22/03/1010

Plans :Plans :

Permeation :Permeation :

Permeation of material coated on treated side versus untreated side.Permeation of material coated on treated side versus untreated side.

Permeation of raw Excell 532 versus raw Hostaphan GN.Permeation of raw Excell 532 versus raw Hostaphan GN.

Selection of material. Selection of material.

Permeation of Coated PET w.r.t. coating thickness.Permeation of Coated PET w.r.t. coating thickness.

Test :Test :

Permeation set up to measure several complete full length tubes.Permeation set up to measure several complete full length tubes.

Neil Dixon PH/DT Neil Dixon PH/DT CERN 22/03/ CERN 22/03/1010

Plans :Plans :

Microscope :Microscope :

Observations of Cu/Au coating on Excell 532.Observations of Cu/Au coating on Excell 532.

Observations of straws manufactured with Excell 532 (weld area).Observations of straws manufactured with Excell 532 (weld area).

Metrology and set up of the straw weld line, clear progress has been made.Metrology and set up of the straw weld line, clear progress has been made.

Neil Dixon PH/DT Neil Dixon PH/DT CERN 22/03/ CERN 22/03/1010

Plans :Plans :

Ultrasonic weld line :Ultrasonic weld line :

Machine set up parameters.Machine set up parameters.

Validation of components ( sonotrod, and anvil )Validation of components ( sonotrod, and anvil )

Manufacture of tubes with Excell 532.Manufacture of tubes with Excell 532.

Pre-production of tubes – May 2010 ?Pre-production of tubes – May 2010 ?

Neil Dixon PH/DT Neil Dixon PH/DT CERN 22/03/ CERN 22/03/1010

Plans :Plans :Mechanical :Mechanical :

Ongoing mechanical deformation under load of straws.Ongoing mechanical deformation under load of straws.

Elongation test of Excell 532 versus Hostaphan GN.Elongation test of Excell 532 versus Hostaphan GN.

Leak test of straw tube made with Excell.Leak test of straw tube made with Excell.

Tensile test of weld, and method to replicate this in JINR.Tensile test of weld, and method to replicate this in JINR.

Peel tests of PET on substrate.Peel tests of PET on substrate.

Peel test of Cu/Au coating on PET.Peel test of Cu/Au coating on PET.

Device for storage of tubes under pressure.Device for storage of tubes under pressure.

Neil Dixon PH/DT Neil Dixon PH/DT CERN 22/03/ CERN 22/03/1010

Conclusion:Conclusion:

Progress is difficult, but

we are converging towards a brand and type of PET

to suit the NA 62 straw tracker detector.

TE/VSC TE/VSC D. Letant-Delrieux, M. Taborelli, W. Vollenberg.D. Letant-Delrieux, M. Taborelli, W. Vollenberg.EN/MME EN/MME M. Scheubel, S. SgobbaM. Scheubel, S. SgobbaPH/DT PH/DT H. Danielsson, N. DixonH. Danielsson, N. DixonJINRJINR S. Movchan.S. Movchan.FP/PI FP/PI D. Gregorio. D. Gregorio. (purchasing)(purchasing)