At the start up of operations for the 2021-2 run, it was discovered that one of the cards which aggregates data from multiple modules in the EIGER2 detector on 24-ID-C was faulty. As a result, NE-CAT was forced to reschedule all users on 24-ID-C for the first week of user operations. However, Dectris was able to immediately send us a replacement part which was successfully installed by Ed Lynch, Jim Withrow, and Malcolm Capel. Replacing the card did require removal of the EIGER2 from the 24-ID-C A-frame and its subsequent re-installation.
At the Plenary Session for the APS/CNM User Meeting, it was announced that the storage ring installation period of the Advanced Photon Source Upgrade project is now scheduled to begin April 17, 2023. NE-CAT and the APS will be 'dark' for 1 year following this date.
Work by the lab of Song Tan at the University of Pennsylvania on structure of the histone demethylase LSD1 bound to its nucleosome substrate together with its accessory protein known as CoREST has been featured on the APS Website.
Structural work on SARS-CoV-2 papain-like protease, SARS-CoV-2-PLpro, required for processing viral polyproteins to generate a functional replicase complex and enable viral spread has been featured as a highlight on the APS website.
SARS-CoV-2 is a zoonotic virus that has caused a pandemic of severe respiratory disease—COVID-19— within several months of its initial identification. Comparable to the first SARS-CoV, this novel coronavirus’s surface Spike (S) glycoprotein mediates cell entry via the human ACE-2 receptor, and, thus, is the principal target for the development of vaccines and immunotherapeutics.
Per the Illinois Stay-At-Home Order, NE-CAT has only has available beamtime for COVID-19 related research. On-site access is not available and all data collection must be conducted remotely.
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The MD2 Microdiffractometer on 24-ID-E has been at NE-CAT for almost a decade. In that time, it has been in constant use. Previously, NE-CAT had purchased spare parts for both microdiffractometers in anticipation of minimizing downtime in the event of mechanical failure. For the past several months, 24-ID-E users have noticed an increasing occurencing of an inability to center their samples which required intervention by beamtime staff. This was eventually narrowed down to an increasingly frequent failure of the zoom on the 24-ID-E.
On February 18, 2020, in support of the COVID-19 outbreak, NE-CAT provided rapid access beamtime to researchers from the Walter Reed Army Institute of Research working on the the SARS-CoV-2 S glycoprotein receptor-binding-domain. The novel coronavirus's surface Spike (S) glycoprotein mediates cell entry via the human ACE-2 receptor, and is the principal target for the development of vaccines and immunotherapeutics.
Rapid Access Beamtime is available for all research projects related to COVID-19.
The APS is currently in shutdown for maintenance until the end of January and NE-CAT has used this opportunity to move the EIGER2 from the dry lab and onto the C beamline. The new detector still needs its protective cover, colloquially called the guillotine, manufactured by Ed Lynch before commissioning proceeds.
The first EIGER2 X 16M in the United States has arrived safely at NE-CAT. This is the largest detector in the EIGER2 line with a 75 x 75 μm pixel and 18,093,576 pixels. It will provide rapid and accurate photon counting. Pascal Hofer and Zachary Brown from Dectris are on-site for initial testing of the detector in the dry lab. We can report that all 32 modules are alive.