scholarly journals A study of air force cooling on self heated wire wound Precision High Voltage divider though Automation

2018 ◽  
Vol 1065 ◽  
pp. 052005
Author(s):  
Kartik ◽  
K.B. Ravat ◽  
Thomas John
Keyword(s):  
Air Force ◽  
High Voltage ◽  
Voltage Divider ◽  
Heated Wire

100 KV Scanning Microscope

1972 ◽  
Vol 30 ◽  
pp. 472-473 ◽  
Author(s):  
A. V. Crewe ◽  
M. W. Retsky
Keyword(s):  
High Voltage ◽  
Voltage Divider ◽  
Electron Gun ◽  
Objective Lens ◽  
Parallel Beam ◽  
Emission Point ◽  
Error Amplifier ◽  
External Reference ◽  
Scanning Transmission ◽  
Transmission Microscope

A 100 kv scanning transmission microscope has been built. Briefly, the design is as follows: The electron gun consists of a field emission point and a 3 cm Butler gun. The beam has a crossover outside the gun and is collimated by a condenser lens.The parallel beam passes through a defining aperture and is focused by the objective lens onto the specimen. The elastic electrons are detected by two annular detectors, each subtending a different angle, and the unscattered and inelastic electrons are collected by a third detector. The spectrometer that will separate the inelastic and unscattered electrons has not yet been built.The lens current supplies are stable to within one part per million per hour and have been described elsewhere.The high voltage is also stable to 1 ppm/hr. It consists of the raw supply from a 100 kv Spellman power supply controlled by an external reference voltage, high voltage divider, and error amplifier.

A HIGH-BANDWIDTH, HIGH-VOLTAGE DIVIDER FOR NEUTRAL INJECTORS

1983 ◽  
pp. 447-453
Author(s):  
P. Kupschus ◽  
S. Haltrich ◽  
H. Reimer
Keyword(s):  
High Voltage ◽  
Voltage Divider ◽  
High Bandwidth

A Quick Response High Voltage Divider

1976 ◽  
Vol 15 (10) ◽  
pp. 2037-2038 ◽  
Author(s):  
Yusuke Kubota ◽  
Noriyuki Kobayashi ◽  
Akira Miyahara
Keyword(s):  
High Voltage ◽  
Voltage Divider ◽  
Quick Response

A high-precision high-voltage divider applied to electron beam energy measurements

2011 ◽  
Vol T144 ◽  
pp. 014063
Author(s):  
W Zhang ◽  
W Chen ◽  
M L Qiu ◽  
Y Q Fu ◽  
R Hutton ◽  
...  
Keyword(s):  
Electron Beam ◽  
High Precision ◽  
High Voltage ◽  
Beam Energy ◽  
Voltage Divider ◽  
Electron Beam Energy

scholarly journals Precision high voltage divider for the KATRIN experiment

2009 ◽  
Vol 11 (10) ◽  
pp. 103007 ◽  
Author(s):  
Th Thümmler ◽  
R Marx ◽  
Ch Weinheimer
Keyword(s):  
High Voltage ◽  
Voltage Divider ◽  
Katrin Experiment

A Highly Stable 150 KV Supply

1971 ◽  
Vol 29 ◽  
pp. 8-9
Author(s):  
N. F. Ziegler
Keyword(s):  
High Voltage ◽  
Wide Band ◽  
Voltage Divider ◽  
Output Impedance ◽  
High Voltage Power Supply ◽  
Band Noise ◽  
Capacitive Divider ◽  
Cathode Follower ◽  
The Stability ◽  
Wide Band Noise

A high voltage power supply has been constructed for use with the ORNL Superconducting Microscope described elsewhere in these proceedings. A simplified schematic diagram of the system is shown in Figure 1. The regulator circuit employs a “bouncer” with a cathode-follower output. This configuration results in a low output impedance and the bouncer can thus drive a load capacitance over a wider bandwidth than the conventional common-cathode circuit. The voltage divider for the regulator is a dual unit originally developed to determine the stability of resistive high-voltage dividers. A dual capacitive divider is an integral part of the voltage divider as shown in Figure 1. The dual units have proven to be very useful in practice since one divider may be used in the regulator while the second is used to monitor the noise present on the high voltage. Mercury cells are used as reference elements in the regulator. Wide-band noise on the output is about one ppm at present. Modifications are now under way to eliminate at least two of the known sources of noise in the system.

Two Developments - A Superconducting Microscope Conversion and A Precision High Voltage Divider

1970 ◽  
Vol 28 ◽  
pp. 354-355
Author(s):  
R. E. Worsham ◽  
J. E. Mann ◽  
E. G. Richardson ◽  
N. F. Ziegler
Keyword(s):  
High Resolution ◽  
Liquid Helium ◽  
High Voltage ◽  
Experimental Evaluation ◽  
Voltage Divider ◽  
Bottom Plate ◽  
Objective Lens ◽  
Optical Bench ◽  
Radiation Shields ◽  
Helium Vapor

Two elements in the chain of development for a 500 kV high resolution microscope have been completed for initial experimental evaluation. They are a conversion of a Siemens Elmiskop I to use a superconducting objective lens and a 150 kV precisely regulated accelerating supply.The superconducting microscope, shown in Fig. 2 is designed as an optical bench for proving the cryostat, lenses, stage mechanism, and other parts prior to the design of a superconducting column for 500 keV. The lens as shown in Figs. 1 and 2 mounts on the removable bottom plate of the 7-liter helium vessel. The vessel is supported and can be clamped rigidly by the four sets of G-10 epoxy-glass posts. Radiation Shields I and II are concentric with the helium vessel. They are cooled by the boil-off helium vapor to about 30 and 130°K, respectively. All electrical leads are carried into the helium vessel through the four symmetrically located vents. Cooldowns from 77°K requires about 30 liters of liquid helium and the boil-off rate is 0.3-0.5 1/HR at either 4.2 or ∼ 1.8°K.

Sign in / Sign up

Export Citation Format

Share Document