Pavel V Degtiarenko

US Patent:

6904957, Jun 14, 2005

Filed:

Aug 30, 2002

Appl. No.:

10/231583

Inventors:

Pavel V. Degtiarenko - Williamsburg VA, US

Assignee:

Southeastern Univ. Research Assn. - Newport News VA

International Classification:

F28F007/00

US Classification:

165 47, 165 801, 378141

Abstract:

A novel particle beam target comprising: a rotating target disc mounted on a retainer and thermally coupled to a first array of spaced-apart parallel plate fins that extend radially inwardly from the retainer and mesh without physical contact with a second array of spaced-apart parallel plate fins that extend radially outwardly from and are thermally coupled to a cooling mechanism capable of removing heat from said second array of spaced-apart fins and located within the first array of spaced-apart parallel fins. Radiant thermal exchange between the two arrays of parallel plate fins provides removal of heat from the rotating disc. A method of cooling the rotating target is also described.

US Patent:

7279882, Oct 9, 2007

Filed:

Oct 4, 2004

Appl. No.:

10/957763

Inventors:

Pavel V. Degtiarenko - Williamsburg VA, US
Danny Wayne Dotson - Gloucester VA, US

Assignee:

Jefferson Science Associates, LLC - Newport News VA

International Classification:

G01N 27/00
A61N 5/00
H01J 3/14

US Classification:

324 713, 2504923, 250397

Abstract:

A beam position detector for measuring the properties of a charged particle beam, including the beam's position, size, shape, and intensity. One or more absorbers are constructed of thermo-resistive material and positioned to intercept and absorb a portion of the incoming beam power, thereby causing local heating of each absorber. The local temperature increase distribution across the absorber, or the distribution between different absorbers, will depend on the intensity, size, and position of the beam. The absorbers are constructed of a material having a strong dependence of electrical resistivity on temperature. The beam position detector has no moving parts in the vicinity of the beam and is especially suited to beam areas having high ionizing radiation dose rates or poor beam quality, including beams dispersed in the transverse direction and in their time radio frequency structure.

US Patent:

7737874, Jun 15, 2010

Filed:

Jun 28, 2008

Appl. No.:

12/215453

Inventors:

Pavel V. Degtiarenko - Williamsburg VA, US
Vladimir E. Popov - Newport News VA, US

Assignee:

Jefferson Science Associates, LLC - Newport News VA

International Classification:

H03M 1/60

US Classification:

341157, 341110

Abstract:

A method for dealing with the problem of simultaneous continuous readout of large number of data channels from the set of multiple sensors in instances where the use of multiple amplitude-to-digital converters is not practical or causes undesirable extra noise and distortion in the data. The new method uses sensor front-end s and subsequent electronics to transform the analog input signals and encode them into a series of short pulses that can be transmitted to a long distance via a high frequency transmission line without information loss. Upon arrival at a destination data decoder and analyzer device, the series of short pulses can be decoded and transformed back, to obtain, store, and utilize the sensor information with the required accuracy.

US Patent:

7911278, Mar 22, 2011

Filed:

Jul 28, 2008

Appl. No.:

12/220764

Inventors:

Pavel V. Degtiarenko - Williamsburg VA, US
Vladimir E. Popov - Newport News VA, US

Assignee:

Jefferson Science Associates, LLC - Newport News VA

International Classification:

H03F 3/08

US Classification:

330308, 250214 A

Abstract:

A first stage electronic system for receiving charge or current from voltage-controlled sensors or detectors that includes a low input impedance current receiver/converter device (for example, a transimpedance amplifier), which is directly coupled to the sensor output, a source of bias voltage, and the device's power supply (or supplies), which use the biased voltage point as a baseline.

US Patent:

8334523, Dec 18, 2012

Filed:

Oct 3, 2008

Appl. No.:

12/286989

Inventors:

Pavel V. Degtiarenko - Williamsburg VA, US

Assignee:

Jefferson Science Associates, LLC - Newport News VA

International Classification:

G02B 5/00
G21K 1/00
H01J 1/52
H01J 3/00
H01J 5/18
H01J 29/46

US Classification:

2505051, 165 47, 165185, 165 801

Abstract:

A method and apparatus for the prevention of overheating of laser or particle beam impact zones through the use of a moving-in-the-coolant-flow arrangement for the energy absorbing core of the device. Moving of the core spreads the energy deposition in it in 1, 2, or 3 dimensions, thus increasing the effective cooling area of the device.

US Patent:

8648314, Feb 11, 2014

Filed:

Jul 22, 2011

Appl. No.:

13/136074

Inventors:

Vladimir Popov - Newport News VA, US
Pavel Degtiarenko - Williamsburg VA, US
Igor V. Musatov - Newport News VA, US

Assignee:

Jefferson Science Associates, LLC - Newport News VA

International Classification:

G01T 3/06

US Classification:

25039011

Abstract:

A fast neutron imaging apparatus and method of constructing fast neutron radiography images, the apparatus including a neutron source and a detector that provides event-by-event acquisition of position and energy deposition, and optionally timing and pulse shape for each individual neutron event detected by the detector. The method for constructing fast neutron radiography images utilizes the apparatus of the invention.

US Patent:

6604575, Aug 12, 2003

Filed:

Aug 30, 2002

Appl. No.:

10/231582

Inventors:

Pavel V. Degtiarenko - Williamsburg VA

Assignee:

Southeastern Univer. Research Assn. Inc. - Newport News VA

International Classification:

F28F 700

US Classification:

165185, 165 803, 361697

Abstract:

A heat exchange apparatus comprising a coolant conduit or heat sink having attached to its surface a first radial array of spaced-apart parallel plate fins or needles and a second radial array of spaced-apart parallel plate fins or needles thermally coupled to a body to be cooled and meshed with, but not contacting the first radial array of spaced-apart parallel plate fins or needles.

US Patent:

20180299570, Oct 18, 2018

Filed:

Apr 11, 2018

Appl. No.:

15/950298

Inventors:

- NEWPORT NEWS VA, US
PAVEL V. DEGTIARENKO - Williamsburg VA, US

International Classification:

G01T 7/00
G01T 3/00
G01T 3/06

Abstract:

An apparatus and method for improving the sensitivity and energy response of neutron detectors and neutron dose rate meters. A beryllium layer is added to neutron detector moderators to improve the sensitivity of the detector. Energy dependence of the sensitivity is optimized by controlling the amount of beryllium in the moderator and by specifying the geometrical design parameters. The beryllium layer, in combination with additional material layers in the moderator, makes the detector response function correspond to the theoretical one in a wide range of energies. Response parameters of the neutron dose rate meter are within 20% of the theoretical response function in the neutron energy range from 500 keV to 10 GeV, and also in the energy range corresponding to thermal neutrons (about 1-100 meV).