Changes

===A Vibration-Free Sample Mount for CHESS===

===A Vibration-Free Sample Mount for CHESS===

As an intermediate step in the above investigations, we needed to find a way to hold diamond samples in the target holder at CHESS that could hold the diamonds in the beam without significant stress or risk of vibration.  An elegant solution to this problem was found in the form of a pair of tightly-stretched mylar films attached to aluminum rings.  The sample is placed in the middle of one of the mylar films, then the other film is placed over it like a sandwich and the two rings bolted together.  Van der Waals forces between the sample and the diamond are sufficient to prevent the sample from moving between the mylar sheets while the target is rotated in the goniometer.  The fabrication technique described below is capable of producing stretched films whose flatness in the central 1 cm region is better than 20 μrad RMS, and whose fundamental resonance is in the vicinity of 1 kHz.

As an intermediate step in the above investigations, we needed to find a way to hold diamond samples in the target holder at CHESS that could hold the diamonds in the beam without significant stress or risk of vibration.  The first attempt was to use a stretched wire mount similar to the one used to hold diamonds in the Hall B target ladder at Jlab.

 

:* [[Hardware for Mounting of Diamond Radiators]] - [[User:Senderovich|Igor Senderovich]]

:* [[Hardware for Mounting of Diamond Radiators]] - [[User:Senderovich|Igor Senderovich]]

:* [[Mylar Stretching for Diamond Mounting]] - [[User: mcintyre|James McIntyre]]

:* [[Mylar Stretching for Diamond Mounting]] - [[User: mcintyre|James McIntyre]]