scholarly journals Cryogenic amplification of image-charge detection for readout of quantum states of electrons on liquid helium

2021 ◽  
Author(s):  
Asem Elarabi ◽  
Erika Kawakami ◽  
Denis Konstantinov
Keyword(s):  
Liquid Helium ◽  
Quantum States ◽  
Image Charge ◽  
Charge Detection ◽  
Image Charge Detection

scholarly journals Image charge detection statistics relevant for deterministic ion implantation

2019 ◽  
Vol 52 (30) ◽  
pp. 305103 ◽  
Author(s):  
Paul Räcke ◽  
Robert Staacke ◽  
Jürgen W Gerlach ◽  
Jan Meijer ◽  
Daniel Spemann
Keyword(s):  
Ion Implantation ◽  
Image Charge ◽  
Charge Detection ◽  
Image Charge Detection

Simulation and measurement of image charge detection with printed-circuit-board detector and differential amplifier

2020 ◽  
Vol 91 (5) ◽  
pp. 053302
Author(s):  
Jace Rozsa ◽  
Yixin Song ◽  
Devon Webb ◽  
Naomi Debaene ◽  
Austin Kerr ◽  
...  
Keyword(s):  
Printed Circuit Board ◽  
Differential Amplifier ◽  
Circuit Board ◽  
Image Charge ◽  
Charge Detection ◽  
Printed Circuit ◽  
Image Charge Detection

Image Charge Detection Mass Spectrometry: Pushing the Envelope with Sensitivity and Accuracy

2011 ◽  
Vol 83 (3) ◽  
pp. 950-956 ◽  
Author(s):  
John W. Smith ◽  
Elizabeth E. Siegel ◽  
Joshua T. Maze ◽  
Martin F. Jarrold
Keyword(s):  
Mass Spectrometry ◽  
Image Charge ◽  
Charge Detection Mass Spectrometry ◽  
Charge Detection ◽  
Image Charge Detection

Accurately Mapping Image Charge and Calibrating Ion Velocity in Charge Detection Mass Spectrometry

2020 ◽  
Vol 31 (10) ◽  
pp. 2161-2170
Author(s):  
Elaura L. Gustafson ◽  
Halle V. Murray ◽  
Tabitha Caldwell ◽  
Daniel E. Austin
Keyword(s):  
Mass Spectrometry ◽  
Image Charge ◽  
Charge Detection Mass Spectrometry ◽  
Charge Detection ◽  
Ion Velocity

scholarly journals Motional quantum states of surface electrons on liquid helium in a tilted magnetic field

2021 ◽  
Vol 103 (5) ◽  
Author(s):  
A. A. Zadorozhko ◽  
J. Chen ◽  
A. D. Chepelianskii ◽  
D. Konstantinov
Keyword(s):  
Magnetic Field ◽  
Liquid Helium ◽  
Quantum States ◽  
Surface Electrons ◽  
Tilted Magnetic Field

A Superconducting Microscope

1971 ◽  
Vol 29 ◽  
pp. 10-11 ◽  
Author(s):  
R. E. Worsham ◽  
J. E. Mann ◽  
E. G. Richardson
Keyword(s):  
Liquid Helium ◽  
Focal Length ◽  
Vacuum System ◽  
Objective Lens ◽  
Electrical Instability ◽  
Radiation Shields ◽  
And Control ◽  
Thermal Oscillations ◽  
Flux Pump

This superconducting microscope, Figure 1, was first operated in May, 1970. The column, which started life as a Siemens Elmiskop I, was modified by removing the objective and intermediate lenses, the specimen chamber, and the complete vacuum system. The large cryostat contains the objective lens and stage. They are attached to the bottom of the 7-liter helium vessel and are surrounded by two vapor-cooled radiation shields.In the initial operational period 5-mm and 2-mm focal length objective lens pole pieces were used giving magnification up to 45000X. Without a stigmator and precision ground pole pieces, a resolution of about 50-100Å was achieved. The boil-off rate of the liquid helium was reduced to 0.2-0.3ℓ/hour after elimination of thermal oscillations in the cryostat. The calculated boil-off was 0.2ℓ/hour. No effect caused by mechanical or electrical instability was found. Both 4.2°K and 1.7-1.9°K operation were routine. Flux pump excitation and control of the lens were quite smooth, simple, and, apparently highly stable. Alignment of the objective lens proved quite awkward, however, with the long-thin epoxy glass posts used for supporting the lens.

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