Fast automated energy changes at synchrotron radiation beamlines equipped with transfocator or focusing mirrors

被引：3

作者：

Stepanov, Sergey ^{[1
]}

Kissick, David ^{[1
]}

Makarov, Oleg ^{[1
]}

Hilgart, Mark ^{[1
]}

Becker, Michael ^{[1
]}

Venugopalan, Nagarajan ^{[1
]}

Xu, Shenglan ^{[1
]}

Smith, Janet L. ^{[2
]}

Fischetti, Robert F. ^{[1
]}

机构：

[1] Argonne Natl Lab, Adv Photon Source, 9700 South Cass Ave,Bldg 436D, Argonne, IL 60439 USA

[2] Univ Michigan, Life Sci Inst, 210 Washtenaw Ave, Ann Arbor, MI 48109 USA

来源：

JOURNAL OF SYNCHROTRON RADIATION | 2022年 / 29卷

关键词：

synchrotron radiation; beamline automation; macromolecular crystallography; CONTROL-SYSTEM; LENS;

D O I：

10.1107/S1600577522001084

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Algorithms and procedures to fully automate retuning of synchrotron radiation beamlines over wide energy ranges are discussed. The discussion is based on the implementation at the National Institute of General Medical Sciences and the National Cancer Institute Structural Biology Facility at the Advanced Photon Source. When a user selects a new beamline energy, software synchronously controls the beamline monochromator and undulator to maintain the X-ray beam flux after the monochromator, preserves beam attenuation by determining a new set of attenuator foils, changes, as needed, mirror reflecting stripes and the undulator harmonic, preserves beam focal distance of compound refractive lens focusing by changing the In/Out combination of lenses in the transfocator, and, finally, restores beam position at the sample by on-the-fly scanning of either the Kirkpatrick-Baez mirror angles or the transfocator up/down and inboard/outboard positions. The sample is protected from radiation damage by automatically moving it out of the beam during the energy change and optimization.

引用

页码：393 / 399

页数：7