Picker Diffractometer Shutter
 
This shutter is made of Alloy 360, Free-cutting Brass
Chemical Composition
Cu 60-63%
Zn33-37%
Pb2.5-3.7%
Fe0.35%
Snnone
 

Fig 1. This is a picture of the assembled tube head and shutter assembly. The yellow arrow points to the shutter shaft. The shaft will have to be altered to fit to the shutter electronics once the tube shield has been completed and the shutter electronics attached.

Fig 2. This picture shows the shutter assembly with its cover removed. The cover is attached by 4 screws located at the ends of the yellow arrows. Also the shutter cover fits into a slot, marked by a red arrow.

Fig 3. This shows the shutter assembly with the shutter removed.

Fig 4. This image shows the disassembled shutter cover. The left piece has a circular groove into which the collimator (or collimator assembly) fits. The groove is indicated by the yellow arrow. The right piece of the cover has a curved surface indicated by the red arrow. The left piece slides over the curved surface. The surface is curved so that the collimator can be oriented in some arbitrary, though small, angle. The angle is mainly related to the take-off angle. It is completely determined by how the collimator fits, and you don't have to worry too much about it.

Fig 5. This shows the bottom of the cover assembly. The yellow arrow indicates the part that fits into the groove shown with the red arrow in Fig 2.

George, you must check the shutter carefully for radiation leaks as soon as you fire up the tube for the first time. I have not checked it, for obvious reasons!

Also, can you please take a picture of your machine after the tube sheild is mounted onto the machine, and the shutter is attached?

Thanks