# US 2019/0246484 A1 · Plasma simulation with non-linear optics

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- Number: US 2019/0246484 A1
- Document ID: US20190246484A1
- Status: Published application
- Kind: A1
- Application number: 15/887,040
- Filed: 2018-02-02
- Published: 2019-08-08
- Earliest claimed: 2018-02-02
- Assignees: Raytheon BBN Technologies Corp.
- Applicants: Raytheon BBN Technologies Corp.
- Inventors: Hari Kiran Krovi
- Web page: https://patentgrep.com/patent/US20190246484A1

## CPC

- H01J 37/32972: {Spectral analysis}
- G01T 1/2914: {Measurement of spatial distribution of radiation}
- H01J 37/32339: {using electromagnetic radiation}
- H01J 37/32926: {Software, data control or modelling}
- H05H 1/46: using applied electromagnetic fields, e.g. high frequency or microwave energy (H05H1/26 takes precedence)
- Y02E 10/549: Organic PV cells
- H01J: ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS (spark-gaps H01T; electric arc lamps H05B31/00; particle accelerators H05H)
- G01T: MEASUREMENT OF NUCLEAR OR X-RADIATION (radiation analysis of materials, mass spectrometry G01N23/00; tubes for determining the presence, intensity, density or energy of radiation or particles H01J47/00)
- H05H: PLASMA TECHNIQUE (apparatus or processes specially adapted for producing X-rays H05G2/00); PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

An optical system for modeling a distribution of plasma particles is provided. The system includes an electromagnetic wave generator configured to generate an electromagnetic wave having a first set of values of a parameter, a non-linear medium configured to receive, from the electromagnetic wave generator, the electromagnetic wave, an output detector configured to detect a second set of values of the parameter responsive to propagation of the electromagnetic wave through the non-linear medium, and a controller configured to select the first set of values of the parameter, communicate the first set of values of the parameter to the electromagnetic wave generator, receive, from the output detector, the second set of values of the parameter, and determine, based on the first set of values of the parameter and the second set of values of the parameter, a distribution of plasma particles.

## Claims

### Claim 1

An optical system for modeling a distribution of plasma particles, the system comprising:
an electromagnetic wave generator configured to generate an electromagnetic wave having a first set of values of at least one parameter;
a non-linear medium configured to receive, from the electromagnetic wave generator, the electromagnetic wave;
an output detector configured to detect a second set of values of the at least one parameter responsive to propagation of the electromagnetic wave through the non-linear medium; and
a controller configured to select the first set of values of the at least one parameter, communicate the first set of values of the at least one parameter to the electromagnetic wave generator, receive, from the output detector, the second set of values of the at least one parameter, and determine, based on the first set of values of the at least one parameter and the second set of values of the at least one parameter, a distribution of plasma particles.

### Claim 2 (depends on 1)

The system of claim 1, wherein the at least one parameter includes at least one of a phase of the electromagnetic wave and an amplitude of the electromagnetic wave.

### Claim 3 (depends on 1)

The system of claim 1, wherein the at least one parameter is indicative of a speckle distribution function of the electromagnetic wave.

### Claim 4 (depends on 1)

The system of claim 1, wherein the non-linear medium has a negative group velocity distribution coefficient.

### Claim 5 (depends on 4)

The system of claim 4, wherein the controller is further configured to modulate a value of the negative group velocity distribution coefficient of the non-linear medium.

### Claim 6 (depends on 1)

The system of claim 1, wherein the non-linear medium includes a pair of diffraction gratings.

### Claim 7 (depends on 1)

The system of claim 1, wherein the non-linear medium includes a pair of prisms.

### Claim 8 (depends on 1)

The system of claim 1, wherein the non-linear medium includes at least one graded-index lens.

### Claim 9 (depends on 1)

The system of claim 1, wherein the non-linear medium includes one or more metamaterials.

### Claim 10 (depends on 1)

The system of claim 1, further comprising a pump beam generator configured to provide a pump beam to the non-linear medium.

### Claim 11 (depends on 10)

The system of claim 10, wherein providing the pump beam to the medium modifies the electron structure of the non-linear medium.

### Claim 12 (depends on 1)

The system of claim 1, wherein the output detector includes a volume hologram.

### Claim 13 (depends on 1)

The system of claim 1, wherein the output detector is configured to detect the second set of values of the at least one parameter using linear tomography.

### Claim 14

A method of modeling a distribution of plasma particles, the method comprising:
selecting a first set of values of one or more parameters of an electromagnetic wave;
communicating the one or more parameters to an electromagnetic wave generator;
detecting a second set of values for the one or more parameters of the electromagnetic wave;
analyzing the first set of values of the one or more parameters and the second set of values of the one or more parameters; and
determining, based on the analysis, a distribution of particles in a plasma system.

### Claim 15 (depends on 14)

The method of claim 14, wherein the one or more parameters include at least one of a phase of the electromagnetic wave and an amplitude of the electromagnetic wave.

### Claim 16 (depends on 14)

The method of claim 14, wherein the one or more parameters are indicative of a speckle distribution function of the electromagnetic wave.

### Claim 17 (depends on 14)

The method of claim 14, further comprising modulating a group velocity distribution coefficient of a medium interacting with the electromagnetic wave.

### Claim 18

A non-transitory computer-readable medium storing sequences of computer-executable instructions for modeling a distribution of plasma particles, the sequences of computer-executable instructions including instructions that instruct at least one processor to:
select a first set of values of one or more parameters of an electromagnetic wave;
communicate the one or more parameters to an electromagnetic wave generator;
detect a second set of values for the one or more parameters of the electromagnetic wave;
analyze the first set of values of the one or more parameters and the second set of values of the one or more parameters; and
determine, based on the analysis, a distribution of particles in a plasma system.

### Claim 19 (depends on 18)

The computer-readable medium of claim 18, wherein the one or more parameters include at least one of a phase of the electromagnetic wave and an amplitude of the electromagnetic wave.

### Claim 20 (depends on 18)

The computer-readable medium of claim 18, wherein the sequences of computer-executable instructions further include instructions that instruct the at least one processor to modulate a group velocity distribution coefficient of a medium interacting with the electromagnetic wave.