Vendors for parts

Ionization Chamber material

Modern Plastics

Source of Ertalyt and G10/FR4 plastic sheets

Address: 676 Howard Ave, Bridgeport, CT, 06605-0574

Phone: (203) 333-3128 / (800) 243-9696

sales reps: Vicky Rivera vrivera@modernplastics.com

Some previously used materials:

Ertalyte, PET NAT PET-P Plate natural

G10/FR4

Rohacell

was a company at Degussa.com

now it is called evonik http://www.evonik.com/en/index.html

http://www.degussa.com/degussa/en/products/productdatabase/default.htm?action=details&page=1&pid=1974&rno=1

http://www.rohacell.com/en/performanceplastics8344.html

Phone # 870 234 0286

The rohacell below was very thick and sturdy. Perhaps it can make a good lightweight chamber. It is not conducting so be carful of charge up effects. Rohacell 110 WF , CMS 01, Rev. G. Type 4 Grade B

Gas Gaskets

Buna-N® A DuPont Dow Elastomers registered trademark brand name of a type of elastomer seal; butyl material which has excellent resistance to gas permeation; an early vacuum seal, generally displaced by Viton®.

http://www-hades.gsi.de/mdc/literatur/outgassing.ps

http://www.vacuumlab.com/Articles/Gas%20Loads%20and%20O-Rings.pdf

Permeation Rates for Air

BUNA-N =[math] 2.5 \times 10^{-7} \frac{torr \cdot liters}{sec \cdot linear inch}[/math]

VITON =[math] 2.5 \times 10^{-8} \frac{torr\cdot liters}{sec\cdot linear inch}[/math]

"The fact that Viton has an air permeation rate that is one order of magnitude lower than Buna-N shows one reason why it is used more and more often in high vacuum systems even though Buna-N's resiliency, as evidenced by the bounce test, makes it easier to achieve a leak-free seal. "

http://www.vacuumlab.com/Articles/Gas%20Loads%20Elastomer-Metal%20Seals.pdf

Marco Rubber

Vendor Contact

Marco Rubber & Plastic Products, Inc. 334 Clark Street North Andover, MA 01845 USA Telephone: 800-775-6525 Fax: 978-688-6915

O-ring design

http://www.marcorubber.com/gd-directory.htm

For example:

another vendor

http://www.allorings.com/material_selection.htm

candidate part numbers

Gasket Cord: part# CB1000-2.36 ; a 2.36 outer diameter O-ring cord which we can use to make O-rings. The O-grin groove should be 1.77 mm deep and you can use superglue to joing the ends of the cord.

Specifications

Compound# Color Hardness Shore A Tensile Mpa (Psi) Elongation % 22Hr C/S @ 100C Low Temp High Temp B1000 Black 70 15.0 (2,150) 400 10 –40°C(–40°F) 120°C(248°F)

• Buna-N is available in a wide range of Durometers and Colors,

Calculating the gaskets min radius of curvature

[math]R = \frac{C E}{S}[/math] ( inches)

where

R= radius of curvature in inches

C= 1/2 the thickness of the material

E= modulus of elasticity

S= maximum fiber stress of yield stress of the material

Example for Buna-N

C = 2.36 mm/2

E= Elongation/Tensile = 4/2150 (1/psi)

S =?

Copper Clad Kapton

1.) Gus Gustafson DuPont Flexible Circuit Materials 14 T. W. Alexander Drive Research Triangle Park, NC 27709 Phone: 919-248-5280

AP7156E: 2 mil (50 micron kapton, 9 mil double sided copper. Need to etch the copper off of one side.

2.) Digikey; Copper foil tape. You can put a layer of kapton on the sticky side to prevent it from outgassing too much

Item # 3M1194D-1FT-ND

Connectors

SHV Panel Bulkhead

Kings solder SHV Bulkhead Receptacle, Kings Part # 1707-1 File:Kings1707-1 DESIGN.pdf

Kings Electronics
1685 Overview Drive
Rock Hill, SC 29730
Toll Free: 1-888-909-5551
Switchboard: 1-803-909-5000

Min order is 1000 pieces = $1300

Astrix can do smaller orders

818-381-8353 ask for Monique

BNC Female Panel Bulkhead

File:Amphenol BNC Panel Bulkhead.pdf

VFAT input connector

Panasonic P5KS 130 pin surface mount 6.5 mm mated heigth, 0.5 mm narrow pitch

https://panasonic-denko.co.jp/ac/e/control/connector/base-base/p5ks/attention/index.jsp

File:VFAT header inputconnector.pdf

http://panasonic-denko.co.jp/ac/e/control/connector/base-base/p5ks/index.jsp

Precidip Connector

20 pin single row 1.27 mm pitch connectors for back of 10 x 10 cm GEM charge collector

Vendor:

http://www.westfield.co.uk/tp/html/13.html straight pin: 850-91-020-10-001

socket connector : 851-91-020-10-001

http://www.westfield.co.uk/tp/html/13.html

Gas Flow

flow meter

GEM detector volums 10 cm x 10 cm x 5 cm = 500 [math]cm^3[/math] = 0.5 Liters

Go back GEMS