An efficiently initiated pulsed H<sub>2</sub>+ F<sub>2</sub>laser

Kerber, R. L.; Ching, A.; Lundquist, M.; Whittier, J. S.

doi:10.1109/jqe.1973.1077595

Cited by 15 publications

(2 citation statements)

References 3 publications

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“…The comparison of the experimental data with the model calculation gave the estimation that a is about 0.7. According to the review work by Kerber et al [19], it is assumed that eight C02 vibrational levels are active in sharing the vibrational energy supplied from the C02 laser light absorbed. The rate constants for the 25 vibrational energy transfer reactions which are most important collisional transitions among these vibrational states are selected from their results.…”

Section: Resultsmentioning

confidence: 99%

Enhancement of the bimolecular reaction of hydrogen iodide by vibrational excitation

Horiguchi

Tsuchiya

1981

Int J of Chemical Kinetics

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The himolecular reaction of HI in CO2, which was excited vibrationally by irradiation of a continuous-wave CO2 laser light, was investigated in the temperature range of K. An enhancement of the reaction rate by a factor of about 2.5 was observed in the 1:l HI-CO2 mixture in comparison with the rate in pure HI when both sample gases were irradiated by a CO2 laser (50 W) a t 1 torr. However, in the HI-SFe mixtures the decomposition rate of HI was not accelerated by irradiation of the C02 laser. Thus the enhancement is attributed to vibrational excitation of HI through collisional energy transfers from laser-excited CO2 (OOol).At lower total pressures or a t lower partial pressures of HI in HILC02 mixtures the enhancement was more significant because of inefficient vibrational deactivation of excited HI. A model calculation gave the result in agreement with the experimental one if the effective activation energy is assumed as EA = E, -(~E,ib, where E, is the activation energy for the thermal reaction, E v i b is the vibrational energy of two colliding HI molecules, and (Y is estimated to he ahout 0.7. This means that a part of the vibrational energy of reacting HI is employed to reduce the activation energy for the translational or rotational degree of freedom.

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Section: Resultsmentioning

confidence: 99%

Enhancement of the bimolecular reaction of hydrogen iodide by vibrational excitation

Horiguchi

Tsuchiya

1981

Int J of Chemical Kinetics

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“…In addition, because the laser inversion is produced by a chemical reaction, and not by the energy used to initiate the chemical reaction, overall electrical efficiencies greater than 100% have been demonstrated for the HF laser. (16) Several other molecular lasers have shown the ability to generate high output powers as well as large overall electrical efficiencies: CO,(1?) COz,^) and KrF.…”

Section: Stevennsuchardmentioning

confidence: 99%

<title>Lasers - Where Are We Now And Where Are We Going?</title>

Suchard

1977

SPIE Proceedings

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Over the past 16 years, the state of laser technology has advanced from the level of the initial demonstration to the myriad of uses that exist today. What the future holds for the uses of lasers can only be guessed at by extrapolation. Lasers have already become an integral part of modern technology, and their number of uses is still expanding rapidly. This paper presents an in -depth overview of laser technologypast, present, and future. The history of the laser and its applications are covered, from the original demonstration to the present, with emphasis on the influence that basic laser studies and laser applications has had on each other.

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Pulsed electron-beam-initiated chemical laser operating on the H2/F2 chain reaction

Aprahamian¹,

Wang²,

Betts³

et al. 1974

Applied Physics Letters

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Pulsed HF and DF chemical lasing has been observed in SF6:F2:H2 and SF6:F2:D2 mixtures, respectively, using an electron beam to initiate the laser reactions. Maximum pulse energies of 50 J with peak output power of 50 MW and an electrical efficiency of 6% were obtained with a 4195-cm3 active volume, a total pressure of 240 Torr, and gas component ratios SF6:H2:F2 of 1.33:1.0:1.0. For an active volume of 236 cm3, a total pressure of 420 Torr, and SF6:H2:F2 equal to 1.5:1.0:1.0, 11 J energy was obtained corresponding to an energy density of 80 J/l atm. For DF lasing from mixtures of SF6, D2, and F2, the output energy is a factor of 2–3 smaller than for HF lasing from mixtures of SF6, H2, and F2 with the same initial conditions.

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An efficiently initiated pulsed H₂+ F₂laser

Cited by 15 publications

References 3 publications

Enhancement of the bimolecular reaction of hydrogen iodide by vibrational excitation

Enhancement of the bimolecular reaction of hydrogen iodide by vibrational excitation

<title>Lasers - Where Are We Now And Where Are We Going?</title>

Pulsed electron-beam-initiated chemical laser operating on the H2/F2 chain reaction

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An efficiently initiated pulsed H2+ F2laser

Cited by 15 publications

References 3 publications

Enhancement of the bimolecular reaction of hydrogen iodide by vibrational excitation

Enhancement of the bimolecular reaction of hydrogen iodide by vibrational excitation

<title>Lasers - Where Are We Now And Where Are We Going?</title>

Pulsed electron-beam-initiated chemical laser operating on the H2/F2 chain reaction

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Product

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An efficiently initiated pulsed H₂+ F₂laser