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Title: Ultra-High Vacuum Compatible Optical Chopper System for Synchrotron X-ray Scanning Tunneling Microscopy

Abstract

High-speed beam choppers are a crucial part of time-resolved x-ray studies as well as a necessary component to enable elemental contrast in synchrotron x-ray scanning tunneling microscopy (SX-STM). However, many chopper systems are not capable of operation in vacuum, which restricts their application to x-ray studies with high photon energies, where air absorption does not present a significant problem. To overcome this limitation, we present a fully ultra-high vacuum (UHV) compatible chopper system capable of operating at variable chopping frequencies up to 4 kHz. The lightweight aluminum chopper disk is coated with Ti and Au films to provide the required beam attenuation for soft and hard x-rays with photon energies up to about 12 keV. The chopper is used for lock-in detection of x-ray enhanced signals in SX-STM.

Authors:
; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science - Office of Basic Energy Sciences - Scientific User Facilities Division; Argonne National Laboratory - Advanced Photon Source
OSTI Identifier:
1400397
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Conference
Resource Relation:
Conference: 12th International Conference on X-Ray Microscopy , 10/26/14 - 10/31/14, Melbourne, Australia
Country of Publication:
United States
Language:
English

Citation Formats

Chang, Hao, Cummings, Marvin L., Shirato, Nozomi, Stripe, Benjamin D., Rosenmann, Daniel, Preissner, Curt A., Freeland, John W., Kersell, Heath R., Hla, Saw Wai, and Rose, Volker. Ultra-High Vacuum Compatible Optical Chopper System for Synchrotron X-ray Scanning Tunneling Microscopy. United States: N. p., 2015. Web. doi:10.1063/1.4937495.
Chang, Hao, Cummings, Marvin L., Shirato, Nozomi, Stripe, Benjamin D., Rosenmann, Daniel, Preissner, Curt A., Freeland, John W., Kersell, Heath R., Hla, Saw Wai, & Rose, Volker. Ultra-High Vacuum Compatible Optical Chopper System for Synchrotron X-ray Scanning Tunneling Microscopy. United States. doi:10.1063/1.4937495.
Chang, Hao, Cummings, Marvin L., Shirato, Nozomi, Stripe, Benjamin D., Rosenmann, Daniel, Preissner, Curt A., Freeland, John W., Kersell, Heath R., Hla, Saw Wai, and Rose, Volker. Thu . "Ultra-High Vacuum Compatible Optical Chopper System for Synchrotron X-ray Scanning Tunneling Microscopy". United States. doi:10.1063/1.4937495.
@article{osti_1400397,
title = {Ultra-High Vacuum Compatible Optical Chopper System for Synchrotron X-ray Scanning Tunneling Microscopy},
author = {Chang, Hao and Cummings, Marvin L. and Shirato, Nozomi and Stripe, Benjamin D. and Rosenmann, Daniel and Preissner, Curt A. and Freeland, John W. and Kersell, Heath R. and Hla, Saw Wai and Rose, Volker},
abstractNote = {High-speed beam choppers are a crucial part of time-resolved x-ray studies as well as a necessary component to enable elemental contrast in synchrotron x-ray scanning tunneling microscopy (SX-STM). However, many chopper systems are not capable of operation in vacuum, which restricts their application to x-ray studies with high photon energies, where air absorption does not present a significant problem. To overcome this limitation, we present a fully ultra-high vacuum (UHV) compatible chopper system capable of operating at variable chopping frequencies up to 4 kHz. The lightweight aluminum chopper disk is coated with Ti and Au films to provide the required beam attenuation for soft and hard x-rays with photon energies up to about 12 keV. The chopper is used for lock-in detection of x-ray enhanced signals in SX-STM.},
doi = {10.1063/1.4937495},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2015},
month = {1}
}

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Works referenced in this record:

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