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ELECTRON DENSITY MEASUREMENT SYSTEM FOR PARTIALLY IONIZED GASES

Award Information

Agency:
Department of Defense
Branch:
Air Force
Award ID:
12996
Program Year/Program:
1990 / SBIR
Agency Tracking Number:
12996
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
SPIRE CORPORATION
1 PATRIOTS PARK BEDFORD, MA 01730-2396
View profile »
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 1
Fiscal Year: 1990
Title: ELECTRON DENSITY MEASUREMENT SYSTEM FOR PARTIALLY IONIZED GASES
Agency / Branch: DOD / USAF
Contract: N/A
Award Amount: $59,756.00
 

Abstract:

A RADIO FREQUENCY MULTI-CHANNEL PROBE ARRAY METHOD IS PROPOSED TO DETERMINE THE DENSITIES OF PLASMAS PRODUCED IN LABORATORY CHAMBERS BY HIGH POWER MICROWAVE BREAKDOWN. IN ADDITION TO MAKING TIMERESOLVED MEASUREMENTS OF ELECTRON DENSITY, THE ARRAY WILL ALSO PROVIDE SPATIAL INFORMATION ON THE PLASMA DENSITY PROFILE. THE PROBE ARRAY METHOD IS BASED ON THE DIRECT RELATIONSHIP BETWEEN THE ELECTRICAL RESISTIVITY OF THE PLASMA AND THE ELECTRON DENSITY, TAKING ADVANTAGE OF THE HIGH COLLISIONALITY OF THE CHARGE CARRIERS WITH THE NEUTRAL GAS PARTICLES. THIS METHOD IS EXPECTED TO MEASURE ELECTRON DENSITIES RANGING FROM 10(4) TO 10(10)CM(-3) IN PLASMAS WITH NEUTRAL GAS PRESSURE OF 0.01 TO 3 TORR. WITH SUFFICIENTLY HIGH FREQUENCY (3 MHZ OR MORE), A TIME RESOLUTION OF 10 MICROSECONDS CAN BE EASILY OBTAINED IN DENSE PLASMAS; DC PROBE DRIVE IS PROPOSED FOR TIME-RESOLVED MEASUREMENTS OF VERY LOW PLASMA DENSITIES. THE TWODIMENSIONAL PROBE ARRAY IS CAPABLE OF DETERMINING A LINE-AVERAGED PLASMA DENSITY PROFILE. THE PROBE TECHNIQUE WILL BE ESPECIALLY IMPORTANT IF THE SPATIAL UNIFORMITY OF THE PLASMA MUST BE MONITORED AND CONTROLLED.

Principal Investigator:

Dr Yi-kang Pu
6172756000

Business Contact:

Small Business Information at Submission:

Spire Corp
Patriots Pk Bedford, MA 01730

EIN/Tax ID:
DUNS: N/A
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No