PositronTargetWorkByChrissJackson

Chriss Jackson's Positron Target development logbook

Goal

Construct a Tungsten target and vacuum enclosure to be used for generating positrons using an incident electron beam.

Geometry

Tungsten Disks

Dimensions are in cm

http://www.alibaba.com/product-gs/346924116/Tungsten_Disk_With_Screw.html

http://www.zlxtech.com.cn/products.asp?productcode=7401000404

http://www.cleveland-tungsten.com/

If the motor has a radius of 2.5" and I want to shield the motor from the beam using 2" of Pb and the beam is about 1" in diameter then I want a Tungsten disk that is

5.21" in radius = 13.25 cm in radius ~ 30 cm in diameter

Target Chamber design

Latest Design From empire and Sadiq's measurement of the available space

Target motor Design	Available beam line space	Motor axle coupling to rotary union	Hub and spline to attache targets

Dimensions for the target chamber box. Measurements in inches. updated 11 May 2012. Holes for tubing still missing, need to measure.

Bottom view	Front View	Left View	Isometric View

ports

• 2 beam line ports, (
• 2 coollant ports
• 1 electrical port
• Ion pump port

Parts	Quantity	Link	Delevary status
10 - pin wiring feedthrough	1	Feedthrough
cooling lines	2	Cooling Hoses	deleraved
IR optical window	1	Optical Window	delevared

The resolution in the above image makes it too dificult to read the numbers.  See if you can upload a PDF version.

1.) Lid with a lip that bolts on.

2.) bolt pattern on the bottom for the motor mounts

3.) find cooling lines for inside the box

4.) Find elbows for the rotary unions.

. . . . 100.) Design a target mounting system

Equipment

Feedthroughs

A: 5.88 B: 3.00 C: 4.25 D: 4.63

http://www.mdcvacuum.com/DisplayPart.aspx?d=MDC&p=611005

Performance tests

Heat load calculation

HRRL_Positron_Rotating_W_Target