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RISS 인기검색어
- 검색키워드
- 저자 : Bonmassar, Luca (검색결과 5 건)
- 무료
- 기관 내 무료
- 유료
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Overview on the Development of UHV Ion Pumps
Bonmassar, Luca The Korean Vacuum Society 2006 Applied Science and Convergence Technology Vol.15 No.3
본 총설논문에서는 초고진공 이온펌프의 개발에 대한 고찰을 하였으며, 이온펌프의 동작원리와 특정 디자인에 대하여 설명하였다. 다양한 가스를 사용할 때의 이온펌프의 성능과 동작범위, 그리고 응용분야 등을 논의하였다. The paper reviews the development of ion pumps, their operating principles and describes particular designs. The performance of ion pumps when used for various gases, their range of operation and fields of application are discussed.
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Luca Bonmassar 한국진공학회 2006 Applied Science and Convergence Technology Vol.15 No.3
The paper reviews the development of ion pumps, their operating principles and describes particular designs. The performance of ion pumps when used for various gases, their range of operation and fields of application are discussed. 본 총설논문에서는 초고진공 이온펌프의 개발에 대한 고찰을 하였으며, 이온펌프의 동작원리와 특정 디자인에 대하여 설명하였다. 다양한 가스를 사용할 때의 이온펌프의 성능과 동작범위, 그리고 응용분야 등들 논의하였다.
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Effect of Drag Stages Surface Roughness on the Compression Ratio of a TMDP
Alessandra Dal Bianco,Luca Bonmassar 한국진공학회 2016 Applied Science and Convergence Technology Vol.25 No.6
The rotor of a turbomolecular drag pump is generally made of an aluminum alloy. Its surface finish is affected by various processes that the rotor itself undergoes during the manufacturing phase. The impact of different surface finishes on the pumping performances of a turbomolecular pump has been mainly investigated by Sawada et al [1]. The present work aims to broaden the previous bibliographic study to the drag stages of a turbomolecular pump by testing the impact of different surface finishes on the compression ratio of the pump. Experimental tests have been made focusing on two processes: the corundum sandblasting and the glass microspheres shot-peening. Both the processes flatten and/or physically remove EDM melted spheres; in particular, blasted surfaces obtained by glass shotpeening are generally smoother than surfaces obtained by corundum sandblasting. In order to characterize the surface texture left by such processes, preliminary surface roughness measurements have been made on the drag rotor disks of several pumps. The experimental tests conducted on both sandblasted and shot-peened rotors confirms previous results obtained on the turbo stages by Sawada et al. [1], showing that the average roughness of the surface has an impact on the compression ratio of the pump; in particular, an increment in the surface roughness causes a corresponding increment in the compression ratio of the pump and vice versa. For the tested pumps, the higher surface roughness gives a factor of increment of about 2 on the measured hydrogen maximum compression ratio of the pump.
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Effect of Drag Stages Surface Roughness on the Compression Ratio of a TMDP
Bianco, Alessandra Dal,Bonmassar, Luca The Korean Vacuum Society 2016 Applied Science and Convergence Technology Vol.25 No.6
The rotor of a turbomolecular drag pump is generally made of an aluminum alloy. Its surface finish is affected by various processes that the rotor itself undergoes during the manufacturing phase. The impact of different surface finishes on the pumping performances of a turbomolecular pump has been mainly investigated by Sawada et al [1]. The present work aims to broaden the previous bibliographic study to the drag stages of a turbomolecular pump by testing the impact of different surface finishes on the compression ratio of the pump. Experimental tests have been made focusing on two processes: the corundum sandblasting and the glass microspheres shot-peening. Both the processes flatten and/or physically remove EDM melted spheres; in particular, blasted surfaces obtained by glass shot-peening are generally smoother than surfaces obtained by corundum sandblasting. In order to characterize the surface texture left by such processes, preliminary surface roughness measurements have been made on the drag rotor disks of several pumps. The experimental tests conducted on both sandblasted and shot-peened rotors confirms previous results obtained on the turbo stages by Sawada et al. [1], showing that the average roughness of the surface has an impact on the compression ratio of the pump; in particular, an increment in the surface roughness causes a corresponding increment in the compression ratio of the pump and vice versa. For the tested pumps, the higher surface roughness gives a factor of increment of about 2 on the measured hydrogen maximum compression ratio of the pump.
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