Comparison of Cu-II 781 nm lasers using high-voltage hollow-cathode and hollow-anode-cathode discharges

Peard, K.A.; Rózsa, K.; Szalai, L.; Tobin, R. C.

doi:10.1109/3.309878

Cited by 26 publications

(29 citation statements)

References 14 publications

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“…The discharge tube has two cathode and two anode segments opposite to each other, and the cathode and anode electrodes are situated on a common cylindrical surface. Using the SHC configuration all the metal ion laser transitions investigated have shown higher gain over earlier constructions [4][5][6][7]. The number of electrode segments in the SHC discharge is not necessarily restricted to four, although in the experimental investigations discharges with four segments have only been reported.…”

Section: Introductionmentioning

confidence: 99%

Monte Carlo analysis of the electrons' motion in a segmented hollow cathode discharge

Rózsa

Tobin

1996

J. Phys. D: Appl. Phys.

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We have investigated the motion of electrons in a new, high voltage segmented hollow cathode discharge, which is known to be an efficient pumping source for charge-transfer excited UV metal ion lasers. We have studied the spatial distribution of ion production, electron energy distributions, statistics of electron avalanches, the fraction of oscillating electrons, and the distribution of the fast electrons' current on the anode surface in a helium discharge having four electrode segments. We have found that the ion production is strongly peaked in the centre of the discharge due to the focusing cathode geometry. The effect of magnetic field on the characteristics of the discharge was also studied. With increasing magnetic field the peak of the spatial distribution of ionization was split into two regions of high ionization rate. Furthermore, due to the magnetic field, at fixed discharge current the number of high-energy electrons absorbed on the anode increased considerably, and a higher number of primary electrons were absorbed by the anode without making any ionization. At constant discharge voltage the fraction of oscillating electrons was found to decrease, due to the applied longitudinal magnetic field. The magnetic field dependence of the spatial distribution of ion production, the energy distribution of electrons absorbed by the anode and the fraction of oscillating electrons at different discharge conditions were also studied in a discharge having six electrode segments.

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Section: Introductionmentioning

confidence: 99%

Monte Carlo analysis of the electrons' motion in a segmented hollow cathode discharge

Rózsa

Tobin

1996

J. Phys. D: Appl. Phys.

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“…Measurements have been performed in a segmented hollow cathode, which is described in detail elsewhere [1,2]. The applied geometry allows to achieve high discharge voltages and to focus high-energy electrons in the centre of the discharge.…”

Section: Resultsmentioning

confidence: 99%

“…He + Cu -Cu* + He AE (1) The rate at which the upper states are populated depends on the density of He and Cu species in the lasing volume, their mutual velocity and the asymmetric C-T cross-section a: R1 = v y . NH+ (2) where the mutual velocity is given by: fkT m•m v= j-, mr= He Cu…”

Section: Introductionmentioning

confidence: 99%

<title>Influence of <formula><sup><roman>3</roman></sup></formula>He isotope on laser generation in a hollow-cathode He-Cu ion laser</title>

et al. 2000

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The influence of 3He isotope on laser performance of a sputtered segmented hollow cathode discharge (SHCD) HeCu ion laser oscillating on 780.8 nm transition is presented. At low currents the laser power and small-signal gain are higher for 3He than for 4He. At higher discharge currents the laser parameters are similar for both isotopes. However, due to lower discharge voltage for 3He, the same laser output power is obtained at smaller electrical input power.

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“…Ar is added to the He gas to promote sputtering of the Cu cathode. [6][7][8][9][10][11][12] There exist a number of models in the literature for HCDs used as metal vapor ion lasers. 10,[13][14][15][16][17][18][19] However, most of these models consider only buffer gas ions, sputtered metal vapor atoms, and corresponding ions, such as for a Cu-Ne laser.…”

Section: Introductionmentioning

confidence: 99%

Hybrid modeling network for a helium–argon–copper hollow cathode discharge used for laser applications

Bogaerts

Gijbels

2002

Journal of Applied Physics

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Articles you may be interested inA global model of the self-pulsing regime of micro-hollow cathode discharges J. Appl. Phys. 111, 053305 (2012); 10.1063/1.3690943 Study of the sputtered Cu atoms and Cu + ions in a hollow cathode glow discharge using a hybrid model J. Appl. Phys. 98, 033303 (2005); 10.1063/1.2005381Study of the Ar metastable atom population in a hollow cathode discharge by means of a hybrid model and spectrometric measurements A hybrid modeling network, consisting of several Monte Carlo and fluid models, is developed for a hollow cathode glow discharge in a mixture of helium and argon, with copper as the cathode material. The species considered in the models are the helium and argon gas atoms, electrons, He ϩ , He 2 ϩ , Ar ϩ , and Ar 2 ϩ ions, He and Ar metastable atoms, fast He and Ar atoms, and sputtered Cu atoms and Cu ϩ ions. The modeling network is applied to typical laser conditions. The results of the model, presented in this article, include the electric potential distribution, the density profiles of the various plasma species, and the relative contributions of the various production and loss mechanisms for the plasma species. The model gives us more insight into the plasma behavior, and is therefore useful for optimization of the discharge efficiency for laser applications.

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Comparison of Cu-II 781 nm lasers using high-voltage hollow-cathode and hollow-anode-cathode discharges

Cited by 26 publications

References 14 publications

Monte Carlo analysis of the electrons' motion in a segmented hollow cathode discharge

Monte Carlo analysis of the electrons' motion in a segmented hollow cathode discharge

<title>Influence of <formula><sup><roman>3</roman></sup></formula>He isotope on laser generation in a hollow-cathode He-Cu ion laser</title>

Hybrid modeling network for a helium–argon–copper hollow cathode discharge used for laser applications

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