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梁俊默,琴彩,崔哲圭 충남대학교 기초과학연구소 1983 연구논문집 Vol.4 No.-
We have studied a Blumlein nitrogen laser which can be operated with a high stability. This has been obtained from a laser tube powered by a pulse forming network in the form of a parallel plate transmission line with low impedance. The energy storage capacitor and the transmission line are constructed with 0.05㎜ thick Al plates and 0.189㎜ thick Mylar films ; their capacitance is 90 ㎋ identically. The water cooled electrodes with separation of 0.3㎜ are 66㎝ in length and connected to the storage capacitor and the transmission line respectively. The best lasing action of the nitrogen laser is observed at laser tube pressure of 12 Torr, charging voltage of 3050 Volts, the repetition rate 28 ㎐, and the spark gap-separation of 7.4㎜. (with the electrode separation 0.3㎜). In this circumstance, the value of E/p is about 847 Volts·㎝^-1·Torr^-1 which is about eight times as large as the values that have been reported by the previous authors.
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나선형 이중 평행판 축전기형 Blumlein 전송회로를 사용한 소형 질소레이저의 동작 특성 연구
양준묵,이치원,조돈수,이봉연 충남대학교 기초과학연구소 1995 忠南科學硏究誌 Vol.22 No.1
The design and performance of a compact nitrogen laser which consists of a Spiral multiple parallel plate capacitor type Blumlein transmission line circuit are described. The laser tube is made by 50 ㎜ long with a 2.5 ㎜ main electrode gap spacing. The output power increased with the spark gap distance. The peak power of 3.0 μJ has been obtained with a spark gap distance of 3.5 ㎜ and a repetition rate of 30㎐. The optimum nitrogen gas pressure was about 60torr independent of the variation of spark gap distance. The laser operates with repetition rate of up to 70 ㎐.
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양준묵,추한태,이봉연 충남대학교 1991 忠南科學硏究誌 Vol.18 No.2
A preionized nitrogen laser with average output power of 3.0 mW in repetition rate of 30 Hz was constructed to be used as a pump for dye lasers such as rhodamine 6G, rhodamine B, coumarin 120 and coumarin 102. Under the optimum dye concentrations and wavelengths, dye laser average output power of rhodamine 6G, rhodamine B, coumarin 120 and coumarin 102 were obtained to be 1.6 mW, 1.1 mW, 1.1 mW respectively. According as nitrogen laser average output power was increased up to 76% by preionization effect, dye laser average output powers of rhodamine 6G, rhodamine B, coumarin 120 and coumarin 102 were increased up to 23%, 38%, 57% and 71% respectively. The nitrogen laser system used for this research can be utilized in dye lasers covering the entire visible spectra and if the nitrogen laser output power is improved, the output power of the coumarin 102 dye laser can be improved higher than that of the rhodamine 6G dye laser.
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다극형 스파크 간격을 사용한 질소레이저의 제작과 그 동작 특성
양준묵,김윤주,추한태,이치원 한국광학회 1996 한국광학회지 Vol.7 No.1
We have constructed and studied a laser system which consists of a multiplex spark gap with 8 couples of spark gaps and a multiple parallel plate capacitor type Blumlein transmission line circuit. In this laser system, the length of the laser tube, the length of the multiplex spark gap and the total thickness of the transmission line circuit are chosen to be 520 mm. The experimental results show that one couple of spark gaps cannot give a uniform and complete lasing through the whole laser tube. All the more, a multiplex spark gap could not perform completely and synchronously. However, a multiplex spark gap in found to contribute to the increase of laser output power and the laser has performed the best when the location is three quarters of the laser tube length.
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Blumlein 전송회로에 의해 선전리되는 질소레이저의 동작특성 연구
양준묵,추한태,이봉연,이치원 충남대학교 1990 忠南科學硏究誌 Vol.17 No.2
The design and construction of nitrogen laser preionized with a Blumlein transmission line circuit is described. For the power supply, we have used a pulse type high voltage power source that can be produce 10 joule energy in a pulse. The condition of maximum output power is observed at N_2 gas pressure of 100 torr, spark gap distance of 6.0 mm, repetition rate of 30Hz with preionization, and the stability increases by 0.7%. The maximum increment of output power is achieved at pressure of 200 torr when preionization is used. Finally we can increase the output power by approximately 60% by using this work, and the E/P value is 133 V㎝^(-1) torr^(-1).
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梁俊默,李致遠 충남대학교 자연과학연구소 1984 忠南科學硏究誌 Vol.11 No.2
We have studied on the economic construction and operational characteristics of the nitrogen laser. The laser tube is 66㎝ long with variable electrode-gap-spacing coupled to the transmission line circuit. This transmission line circuit is assembled with tow sets of Blumline transmission line circuits, which we call the double transmission line circuit. Each transmission line circuit consits of 3 sheets of 0.188㎜ mylar films and 4 sheets of aluminum foils. the optimum operational conditions of this nitrogen laser are 80torr in nitrogen gas pressure and 6500volts in voltage. In this conditions, we have measured that, repetition rate is 21㎐,the stability of the optical power is 70% and E/p is 270 volts /㎝-torr which was measured to be 2.5 times as large as that of the othe reports so tar.
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强制循環 溫水 보일러를 爲한 過熱蒸氣 發生 보일러에 關한 硏究
梁俊默 大田工業專門學校 1978 論文集 Vol.22 No.-
In order to make a forced circulation of the hot-water through the heating complex, we carried out experiments on the super heat boiler which is original In its design. In this experiment, we succeeded to make the hot water discharge from the forced circulator coupled to the super heat boiler at the rate of 250cc/min and the present work suggests that the super heat boiler can be developed to meet the practical application standards.
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中性原子의 TFD 函數値數表와 그의 最大電子 密度半徑의 計算
梁俊默 순천향대학교 1980 논문집 Vol.3 No.1
A new table of Thomas-Fermi-Dirac functions for neutral atoms is calculated transforming the Thomas-Fermi-Dirac functions of Thomas into that of Umeda and using of the new boundary radii. Our calculations of atomic radii by the new table are seen in good agreement with the Hartree-Fock's and give the value of 0.7776 in Bohr unit for hydrogen, which is 1.826 times as large as the Umeda's result for hydrogen.
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