• Journal of the Optical Society of Korea
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• v.15 no.4
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• pp.368-372
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• 2011

An advanced microcolumn is proposed which adopts a modified einzel lens structure. The newly designed einzel lens is composed of four electrodes. The two center electrodes are specially designed electrostatic quadrupole (EQ) einzel lenses having keyhole instead of circular apertures. We constructed the advanced microcolumn with the EQ-einzel lenses, and operated the newly designed microcolumn in single lens mode and double-lens mode. The preliminary results show that the EQ-einzel lens can improve the performance of the micro-column for large sample applications.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2009.10a
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• pp.714-715
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• 2009

• Proceedings of the Korean Society of Dyers and Finishers Conference
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• 2006.11a
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• pp.196-198
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• 2006

• Applied Biological Chemistry
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• v.1
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• pp.41-42
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• 1960

식품회분(食品灰分)의 Kali함량(含量)을 ${\beta}$방사능측정(放射能測定)으로 산출(算出)한 것과 염광도법(焰光度法)으로 정량(定量)한 것을 비교(比較)하여 어느 한도(限度)에서 일치(一致)함을 보았으며 이용가치(利用價値)있음을 알았다.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2014.10a
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• pp.486-487
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• 2014

• Proceedings of the Korean Vacuum Society Conference
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• 2008.02a
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• pp.374-374
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• 2008

• Proceedings of the Korean Vacuum Society Conference
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• 2004.08a
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• pp.120-120
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• 2004

• Proceedings of the Korean Vacuum Society Conference
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• 2004.08a
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• pp.122-122
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• 2004

• Proceedings of the Korean Nuclear Society Conference
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• 2001.10a
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• pp.131.2-131
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• 2001

• Proceedings of the Korean Vacuum Society Conference
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• 2002.02a
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• pp.94-94
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• 2002