Cover Page/Proposal Summary
Date Due: 5/3/99
NASA PROCEDURE FOR HANDLING PROPOSALS
This proposal shall be used and disclosed for evaluation purposes only, and
a copy of this Government notice shall be applied to any reproduction or
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on this proposal shall also be strictly complied with. Disclosure
proposal for any reason outside the Government evaluation purposes
shall be made
only to the extent authorized by the Government.
|Proposal Type: New
|Proposal Category: Laboratory|
|Major Equipment Proposal?
|Do you intend to submit an Education/Public Outreach (E/PO)
Impact Cross Sections for Atoms and Molecules of Planetary
|Abbreviated Proposal Title:|
Atomic and Molecular Collisions Research Element, Earth and
Space Sciences, MS 183-601
Jet Propulsion Lab.
4800 Oak Grove
Pasadena, CA 91109-8099
Phone: 818-354-2145 Fax:
|Sci Co-I ||Dr. Isik
Kanik ||JPL ||firstname.lastname@example.org
|Sci Co-I ||Dr.
Khakoo ||CalState ||mkhakoo@exch
Collab ||Dr. Joseph M.
Ajello ||JPL ||email@example.com
In planetary atmospheres, stellar atmospheres and diffuse molecular
dominant energy mechanism for energy transfer is electron
with neutral species leading to UV radiation.
However, a fundamental limitation
in obtaining accurate composition
and energy deposition information from
spacecraft observations (i.e.
emission measurements) is the accuracy of the
cross sections used in
the data reduction algorithms (models), many of which are
absolute accuracies of only +/- 25-50%. It is only recently with the
technical development of the Electron Collision Processes Laboratory
at JPL that
a high level of accuracy (7-12% depending on the signal
electron-impact excitation cross section measurements
for at low-energy region
has become possible and
electron-impact-induced excitation processes can be
studied with a
high level of confidence. To answer the need for electron-impact
excitation cross sections for species of importance in planetary
with better accuracy for use in modeling ground and
spacecraft observations of
the planetary atmospheric spectra, we have
established a collaborative research
program between the Jet
Propulsion Laboratory (JPL) and California State
In this three-year renewal proposal, we
propose:(a) To extend our
earlier cross section measurements for H2, from the
energy range to the low, near threshold energy region (<20 eV)and
measure the electron-impact excitation cross sections of the (b3Su+,
c3Pu, B1Su+, and C1P )states in low, near threshold energy
region. (b)To measure
the electron-impact excitation cross sections of
SO2, O and O2 in the low, near
threshold (0.5 eV above the threshold)
energies, for the first time (8-20 eV).
(c)To calibrate the electron
excitation cross sections utilizing a novel
electron TOF technique.
These species represent the most important atomic
species in the Jovian planetary system.