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A NOVEL OPTICAL CONCEPT FOR RAPID SCANNING TWO-DIMENSIONAL THOMSON SCATTERING

Award Information

Agency:
Department of Energy
Branch:
N/A
Award ID:
7068
Program Year/Program:
1988 / SBIR
Agency Tracking Number:
7068
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
SCIENCE RESEARCH LABORATORY INC
15 Ward Street Somerville, MA -
View profile »
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 2
Fiscal Year: 1988
Title: A NOVEL OPTICAL CONCEPT FOR RAPID SCANNING TWO-DIMENSIONAL THOMSON SCATTERING
Agency: DOE
Contract: N/A
Award Amount: $495,000.00
 

Abstract:

KNOWLEDGE OF THE ELECTRON TEMPERATURE AND DENSITY THROUGHOUT THE CROSS-SECTION OF A PLASMA FUSION DEVICE IS NEEDED FOR DETAILED UNDERSTANDING OF ITS PERFORMANCE. PRESENT THOMSON SCATTERING TECHNIQUES, WHICH EMPLOY A FIXED OPTICAL ARRANGEMENT, ARE CAPABLE OF PROVIDING SIMULTANEOUS MEASUREMENTS OF THE ELECTRON TEMPERATURE AND DENSITY AT MULTIPLE LOCATIONS ALONG A SINGLE PATH TRAVERSED BY A LASER BEAM THROUGH THE PLASMA. FUTURE NONCIRCULAR TOKAMAKS, SUCH AS ALCATOR C-MOD AND CTT (THE COMPACT IGNITION TOKAMAK), ARE EXPECTED TO HAVE ASYMMETRIC TEMPERATURE AND DENSITY PROFILES BUT TO BE OPERATED FOR LONG STEADY-STATE PERIODS. SWITCHING THE OPTICAL PATH TO BEFOLLOWED BY A 50-HZ ND:YAG LASER DURING THE 20-MSEC-PERIOD BETWEEN PULSES AND PROPERLY DESIGNING THE THOMSON SCATTERED LIGHT COLLECTION OPTICS WOULD ENABLE TWO-DIMENSIONAL ELECTRON TEMPERATURE AND DENSITY PROFILES TO BE DETERMINED WITHIN A SINGLE TOKAMAK DISCHARGE. A SYNCHRONOUSLY POSITIONED OPTICAL ELEMENT (E.G., A MIRROR) WOULD DIRECT THE BEAM ALONG SEPARATE, NEARLY VERTICAL CHORDS FOR SUCCESSIVE LASER PULSES. TECHNIQUES TO SIMULTANEOUSLY DIRECT THE LASER BEAM AND COLLECT THE SCATTERED LIGHT RELIABLY FROM A TWO-DIMENSIONAL ARRAY OF LOCATIONS USING A LIMITED NUMBER OF SPECTROMETERS WILL BE EVALUATED. IN ADDITION, IMPORTANT ISSUES THAT MUST BE CONSIDERED IN DESIGNING SPECTROMETERS FOR THE HIGH TEMPERATURES (5-10-KEV)EXPECTED IN NEXT-GENERATION TOKAMAKE WILL BE EVALUATED.

Principal Investigator:

Dr Reich Watterson
6175471122

Business Contact:

Small Business Information at Submission:

Science Research Laboratory In
15 Ward St Somerville, MA 02143

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