ISSN:0034-6748    

DOI:10.1063/1.1751537

出版商:AIP    

年代:1939

数据来源: AIP

摘要:

A treatment of the acceleration of particles by the linear resonance accelerator is given, including the calculation of the velocity distribution of particles emergent from the device and a method for improving the yield and the velocity distribution. Calculated curves showing these features are shown. The mass selection properties of the device are also considered. Focusing is considered briefly and a discussion of the characteristics of a quarter wave‐length line as applied to a resonance accelerator is included. The experimental features of a linear accelerator as built up are described. Probable particle energies to be expected from any future device of the kind are indicated.

ISSN:0034-6748    

DOI:10.1063/1.1751538

出版商:AIP    

年代:1939

数据来源: AIP

摘要:

Two types of balance are described for measuring small weights by application of a magnetic force in place of the usual system of calibrated weights. One method is applied to an analytic balance, the other to a vacuum balance.

ISSN:0034-6748    

DOI:10.1063/1.1751539

出版商:AIP    

年代:1939

数据来源: AIP

摘要:

An electrode for use with an instrument which records data by the firing of a spark through graph paper and a relay circuit which acts to limit the discharge to a single spark are described.

ISSN:0034-6748    

DOI:10.1063/1.1751540

出版商:AIP    

年代:1939

数据来源: AIP

摘要:

A description is given of a simple motor‐driven apparatus for the deposition of built‐up molecular films on plane solid surfaces. Special features of the apparatus are its portability and simplicity of construction, and it is suitable both for lecture demonstrations and for research.

ISSN:0034-6748    

DOI:10.1063/1.1751541

出版商:AIP    

年代:1939

数据来源: AIP

摘要:

The Rideal absorption hygrometer has been studied with a view to its possibilities as a laboratory instrument for the measurement of the hygroscopic condition of gas in small and confined spaces. The theoretical errors due to adsorption of moisture upon the containing walls of the apparatus, and the error introduced by the presence of stagnant air in the connecting tubes of the hygrometer, have been derived. The nature of the theoretical error due to adsorption is supported by experiments. The temperature changes occurring in the hygrometer, during the process of an experiment, have been followed and corrections applied. The results, thus corrected, show reasonable agreement with the published data upon the saturated vapor pressure of water. Finally a hygrometer has been built suitable for immersion in a thermostat. Measurements with this instrument have been compared with reliable dew point determinations taken in a hygrostat of special design.

ISSN:0034-6748    

DOI:10.1063/1.1751542

出版商:AIP    

年代:1939

数据来源: AIP

ISSN:0034-6748    

DOI:10.1063/1.1751544

出版商:AIP    

年代:1939

数据来源: AIP

ISSN:0034-6748    

DOI:10.1063/1.1751545

出版商:AIP    

年代:1939

数据来源: AIP