Design modification made to the radiation shield (option 2) since the OSAKA

meeting

Stephanie Yang

Fig. 1

Fig 2

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Fig 4

The design allows a total manual operation with the aid of a simple jig

Extruded nib to limit rotation of link

3-D view of the shutter positioning lever

Main points about the option design:-

• Low cost construction;

• Completely manual operation using temporary shutter positioning lever;

• Temporary jig can be stored away during normal operation of the experiment;

• Using bellow to maintain vacuum seal while allowing shutter movement is a proven technology;

• Chosen bellow configuration can be bought as a standard item;

• Two bellows of 250mm each to be spliced to form one complete bellow to satisfy the required travel distance;

• Linear movement of shutter uses standard linear motion with ball bearing;

Option 2 is a truly simple design and we would recommend the technical board to accept this design