High Performance Capacitor for Pulsed Plasma Thruster

Award Information
Agency:
National Aeronautics and Space Administration
Branch
n/a
Amount:
$69,954.00
Award Year:
2001
Program:
SBIR
Phase:
Phase I
Contract:
n/a
Agency Tracking Number:
NASA1590
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
Jaycor, Inc.
4970 Corporate Dr. St. 110, Huntsville, AL, 35805
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
n/a
Principal Investigator:
Theron Henderson
Senior Managing Scientist
(256) 837-9100
Bo.Henderson@jaycor.com
Business Contact:
Frank Robbins
Contracts
(858) 535-3160
ewenaas@jaycor.com
Research Institution:
n/a
Abstract
A high energy density capacitor will be developed utilizing Chemical Vapor Deposited diamond as the dielectric. The energy density of diamond multi-layer stacked or comb structure capacitors can potentially exceed 20 J/g. Even more modest energy densities of 2 J/g significantly exceed the current state-of-the-art capacitors used for Pulsed Plasma Thrusters on spacecraft. The use of high energy density diamond capacitors in PPT systems could reduce the mass of the propulsion system by 30%. Previous measurements of diamond test capacitors indicate breakdown voltages in the 3 to 4 kV/micron range and a dielectric constant of 5.5. The high temperature capability of diamond and its non-dipole crystal structure will allow rapid charge/discharge cycles without damage. During Phase I, a single layer test capacitor 5 cm. in diameter will provide 35 nano-farads of capacitance and 0.16 Joules of energy with an energy density of 0.04 J/g. Phase II will develop a multi-layer capacitor in a stacked configuration to increase the energy density, capacitance, and total energy stored in the capacitor. The Phase II device is expected to have energy density greater than 0.5 J/g, provide 1 micro-farad capacitance, and store 4.5 Joules of energy and reduce PPT system mass by 30%.

* information listed above is at the time of submission.

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