ISSN:0947-076X    

DOI:10.1002/vipr.19900020402

出版商:WILEY‐VCH Verlag    

年代:1990

数据来源: WILEY

ISSN:0947-076X    

DOI:10.1002/vipr.19900020403

出版商:WILEY‐VCH Verlag    

年代:1990

数据来源: WILEY

ISSN:0947-076X    

DOI:10.1002/vipr.19900020404

出版商:WILEY‐VCH Verlag    

年代:1990

数据来源: WILEY

ISSN:0947-076X    

DOI:10.1002/vipr.19900020405

出版商:WILEY‐VCH Verlag    

年代:1990

数据来源: WILEY

摘要:

AbstractThe choice of a vacuum pump for the chemical laboratory depends more and more on economical and ecological qualifications. The water jet pump, widespread because of its simple and robust design, can satisfactorily fulfil these qualifications only in a few applications. Rotary vane and diaphragm vacuum pumps are of much more complicated design; the most outstanding assets, however, are that they work without contamination of water; further, they provide a large pumping speed also at low suction pressures.

ISSN:0947-076X    

DOI:10.1002/vipr.19900020406

出版商:WILEY‐VCH Verlag    

年代:1990

数据来源: WILEY

摘要:

Abstract“Molecular beam epitaxy is a very flexible method for the preparation of thin epilayers of semiconductors, metals or insulators. In this contribution we deal with the questions how such an epitaxy system can be realized, why it is used in high technology of the future and what are the main advantages

ISSN:0947-076X    

DOI:10.1002/vipr.19900020407

出版商:WILEY‐VCH Verlag    

年代:1990

数据来源: WILEY

摘要:

AbstractWithin the last 10 years, the cryopump was added to the range of the pumps used in the high vacuum and ultra high vacuum fields. The choice of the right pump often turns out to be difficult. One of the reasons could surely be that the user is not often familiar with the properties of the cryopumps. The article is meant to make the reader aware of all possible criteria, which in turn will make it easier for him to make a decision concerning the pump required for the application.The refigerator cryopumps can be used in any application for which hydrocarbonfree vacuum is required as well as a high pumping speed for almost all gases.

ISSN:0947-076X    

DOI:10.1002/vipr.19900020408

出版商:WILEY‐VCH Verlag    

年代:1990

数据来源: WILEY

ISSN:0947-076X    

DOI:10.1002/vipr.19900020409

出版商:WILEY‐VCH Verlag    

年代:1990

数据来源: WILEY

ISSN:0947-076X    

DOI:10.1002/vipr.19900020410

出版商:WILEY‐VCH Verlag    

年代:1990

数据来源: WILEY

摘要:

AbstractA radiation furnace for rapidthermal‐annealing experiments is introduced, in which infrared lamps serve as heat sources. It can be regulated fast enough in order to produce temperature profiles which involve temperature variations within the order of seconds. The furnace was tested in self‐diffusion studies of59Fe in amorphous Fe40Ni40B20. It was found that the Fe self‐diffusion coefficient obeys an Arrhenius law even at temperatures which are too high to be realized in a conventional furnace without the onset of crystalliz

ISSN:0947-076X    

DOI:10.1002/vipr.19900020411

出版商:WILEY‐VCH Verlag    

年代:1990

数据来源: WILEY