Feb 6, 2017
The PS/PSS (photon stop - personnel safety shutter) has arrived. This is the main shutter inside the ring for Gemini.
The unit was custom built by FMB-Oxford, and had to go through extensive review by safety at the ALS, since it is the first of its kind here, though Oxford has built similar units for the Diamond Light Source.
Dec 13, 2016
Oct 6, 2016
Namely, we have planned:
Install of the first aperture (AP001) inside the shield wall
Install anchors, stand, and first valve (VVR001) inside the shield wall
Install IG1 Top-Off shielding aperture inside the shield wall
Install LCW (house water system) front end manifolds, inside the shield wall
Install 2X LN2 drops (1X for the hutch, 1X for the mono) outside the shield wall
May 21, 2016
April 20, 2016
September 18, 2015
June 30, 2015
I never would have guessed how much could go into the design of a hutch. This week, the engineering team investigated all the repercussions of the planned Gemini hutch height, which can be a maximum of 11 feet high, given the space constraints. The hutch height influences the earthquake stability, the number and position of feedthroughs for cabling, the thermal cycling of the hutch, and the type/position of equipment inside the hutch. Of particular concern was the height of the detector gantry. It has to be high enough that the detector can be moved vertically upward high enough to record high resolution data, but not so high that vibrational stability becomes an issue. It is all sorted out now with a detector gantry design that fits into an agreed-upon hutch height of 10.5 feet.
April 9, 2015
The design of the front-end of Gemini is complete! Engineering ran into a snag last month when they discovered an electrical panel in the front-end that was not documented in any of the ALS drawings. However, they were able to design all the front-end components around the unexpected box, and in fact complete the design. One interesting point is that the final heat-load analysis on the apertures indicated that all the water cooling will have to be "dual pass", which means more complicated drilling of the pieces than in the initial design. The vacuum analysis also indicated that one more ion pump would be needed than in the initial design. But now that these designs are finalized, Engineering will schedule the internal LBNL reviews in the next two months, and then ordering for front-end components will begin this summer. This will leave plenty of time for install in the 2016 shutdown.
Feb 20, 2015
We just got out of a meeting with the Engineering group, who have been doing a very thorough analysis on heat load on the sector 2 front-end apertures. The analysis covers all the worst case (beam mis-steering) possibilities. This is required for the internal engineering reviews as well as the optical design review, and will also ensure that we can close the undulator gap to its minimal value. Below is page 6 from the 50 page analysis document!
Feb 17, 2015
This picture may not mean much to anyone outside the ALS controls group, but it shows the "rotated kicker": an element in the ALS ring in sector 2 that had to be modified to make way for the Gemini undulator. The test of this new device was successful, showing that changes to the current sector 2 elements will not adversely affect operations. Ie, all the other beamlines at the ALS will be just fine! This was an important milestone for the ALS in the Gemini project.
Dec 3, 2014
We (Corie Ralston, Simon Morton, and Peter Zwart) were very pleased to see how organized the LBNL Engineering group is with project management, now that they have swung into full gear. They are using Windchill for the sector 2 project management, which organizes everything in the project, from budget to schedule. All the technical information has now been migrated over to Windchill, including all the quotes for endstation components and beamline optics, as well as the notes from the lengthy technical discussions with the various undulator vendors.
Funding Has Arrived
As of September 2014, we now have the starting funds to build out the sector 2 at the ALS!
Funded primarily by the Howard Hughes Medical Institute, this macromolecular crystallography beamline facility will be a state-of-the-art, high performance and high-throughput set of beamliness designed to enhance and increase productivity of the crystallography experiment for scientists around the world. Everyone at the BCSB is very excited by this news, and we will be sharing specs and news here as the project progresses.