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1.2 Layout of the 

in situ

 sample stick

 

 
The liquid sample stick is designed to fit into the DEVA flow cryostat, details of 
which can be found in the DEVA manual.  It consists of a shapol target cell 30 mm x 
30 mm with a mylar window upon which may be mounted an RF coil.  Two stainless 
steel capillaries provide a means of flowing liquid into and out of the cell along with 
feed throughs for an RF excitation signal and a pick-up coil. 
 

 

 

Figure 2

  The liquid-sample cell mounted on a sample stick with a flat coil suitable for RF 

µ

SR.

 

 
 
 

1.3 Layout of the pump

 

 
The pump used with the Muon Liquid Handling System consists of a rotary pump 
used to reduce the pressure of large volumes of gas and a turbo pump to achieve a 
high vacuum.  The main features pump used on the liquid handling system are shown 
in the diagram below. 
 

 
 

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Summary of Contents for Muon Liquid Handling System None

Page 1: ...Muon Liquid Handling System User Guide C Johnson S P Cottrell et al Version 0 2 1...

Page 2: ...essel 2 7 2 2 3 Removing air from Vessel 3 7 2 2 4 Evacuation of the sample cell 7 2 3 Freeze Pump Thaw cycle 8 2 3 1 Sample in Vessel 1 8 2 3 2 Sample in Vessel 2 8 2 3 3 Sample in Vessel 3 9 2 4 Liq...

Page 3: ...uid handling system are shown in Figure 1 Inlet 1 Inlet 2 Gas pressure Cell pressure To pump To cell Baratron Vessel 2 Vessel 1 Vessel 3 Figure 1 The layout of the front panel on the muon liquid handl...

Page 4: ...e a means of flowing liquid into and out of the cell along with feed throughs for an RF excitation signal and a pick up coil Figure 2 The liquid sample cell mounted on a sample stick with a flat coil...

Page 5: ...Roughing Turbo switch Off Run switch Pressure reading Turbo control panel Turbo Pump Rotary Pump Figure 2 The layout of the front panel on the vacuum pump used with the muon liquid handling system 5...

Page 6: ...ls It is important to note that a small amount of liquid may remain in the system after sample loading is finished Care must be taken to prevent this liquid reaching the pump 2 2 Evacuation of the sys...

Page 7: ...n the sample is frozen a vacuum can be achieved by switching the pump to its roughing mode and opening valve V1 For a high vacuum switch the pump to turbo 2 2 3 Removing air from Vessel 3 Once the sys...

Page 8: ...be read from the baratron gauge Tap B should be closed to prevent suck back of the liquid as the solid thaws The sample can be warmed gently to aid the thawing process and when complete close tap A 2...

Page 9: ...t by cooling evacuation or both 2 4 1 Vessel 1 to sample cell The transfer of liquid from Vessel 1 to the sample cell is brought about by the difference in pressure between that in the Vessel and a va...

Page 10: ...the sample cell When it is judged that sufficient liquid has been transferred to fill the sample cell close valve V5 At this point it must be remembered that the lower manifold contains liquid which m...

Page 11: ...e evacuation procedure may be required The liquid may also be encouraged to leave the sample cell by using a small amount of gas Close valve V3 and open valve V9 to allow helium gas into this part of...

Page 12: ...liquid may also be encouraged to leave the sample cell by using a small amount of gas Close valve V3 and open valve V10 to allow helium gas into the lower part of the system Close valve V10 and carefu...

Page 13: ...he rig Muon spin resonance experiments were performed at 2 G and 20 G followed by reattached to the rig At this point the rig was open to the air and so had to be evacuated and pumped for 30 minutes T...

Page 14: ...ond experiment all of the n hexane used in the first experiment was recovered into a sample bottle and dried using a small piece of clean sodium The liquid was carefully poured back into Vessel 1 and...

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