Shutdown work in progress

ALS is down for the month of July and the first week or so of August. We are taking the opportunity to do a bunch of preventative maintenance on our beamlines. Some of the items include:
– cleaning the Be window on 502 (may help to decrease scatter in images)
– replacing air lines
– flushing the 501/503 monochromators
– drying out and cleaning all cryojets
– drying out and replacing various parts on the 821 and 502 cryocoolers
– replacing power supplies on detector PCs
– replacing the 501 dewar insulation and lid interface
– replacing the 501/502/503 LN2 innerter valves (they have become leaky over the years)
– replacing detector chiller coolant and rebuilding of the vacuum pumps
– upgrade CentOS on all linux boxes

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Where have all the CCDs gone?

During the January shutdown, we decided to test the two Q315R detectors that used to live in beamlines 5.0.1 and 5.0.2. Fortunately, they still work! Once Gemini is commissioned (at the end of this year, if all goes well) then we will have to take the Pilatus out of 5.0.1 and move it over to Gemini. Therefore, good to know that the Q315R is still good. Here it is being tested on the floor at 5.0.1.

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Space Crystals

Recently, Marc helped a user run some crystals which the user had arranged to have grown in zero-gravity. Here are pictures of the crystal capillaries mounted at the beamline, and the raster grid used to locate crystals within a capillary.

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