摘要:

A sensitive, rugged pressure gauge is described that was developed to determine the density (composition) and the viscous pressure loss in flowing streams of UO2‐NaK slurries. The differential pressure sensors are two metal bellows that are rigidly connected in opposition, the net displacement of which is detected by a linear variable differential transformer. The sensitivity of the unit is 0.05 mm Hg pressure and the range is 100 mm Hg with an accuracy of ±0.4%. By simply inserting various calibrated springs in the instrument it is possible to increase or decrease the range and maintain the sensitivity at 0.05% of the range.

ISSN:0034-6748    

DOI:10.1063/1.1716024

出版商:AIP    

年代:1958

数据来源: AIP

摘要:

The analysis considers the condensation of high‐velocity molecular beams on condenser surfaces having very low temperatures. The condenser surface area and volume necessary to maintain a given vacuum are derived theoretically from a highly idealized model.

ISSN:0034-6748    

DOI:10.1063/1.1716025

出版商:AIP    

年代:1958

数据来源: AIP

摘要:

A propane bubble chamber with a sensitive volume of 30½ in. by 21½ in. by 6½ in. deep operating in a magnetic field of 14 000 gauss is described. Operating parameters and some engineering details are given. The part of the chamber containing the propane is hydrostatically supported in oil through which the chamber is photographed. This permits the use of small glass windows with a large safety factor.

ISSN:0034-6748    

DOI:10.1063/1.1716026

出版商:AIP    

年代:1958

数据来源: AIP

摘要:

A 60° wedge‐focusing magnetic spectrometer has been built for use with the 450‐Mev proton beam of the Chicago synchrocyclotron. It has curved pole edges to produce good focusing in one plane only. The minimum line width obtainable is ∼¼% with an available solid angle of ∼1/2000 sterad. The deflection is vertical, and angular distributions can be measured from 7° to 173° without allowing the primary beam to strike the magnet yoke.

ISSN:0034-6748    

DOI:10.1063/1.1716027

出版商:AIP    

年代:1958

数据来源: AIP

摘要:

A combination instrument is proposed in which a broad‐range magnetic spectrograph can be operated as such or in connection with a magnetic quadrupole lens to form a high‐intensity spectrometer. A solid angle of approximately 10−2steradian can be attained with this spectrometer without use of very large magnet gaps.

ISSN:0034-6748    

DOI:10.1063/1.1716028

出版商:AIP    

年代:1958

数据来源: AIP

摘要:

A direct reading instrument for lifetime measurements in semiconductors is described. It is based on the phase shift that exists between a sinusoidal modulation of carrier injection and the corresponding modulation of specimen conductance. Carrier injection is effected optically, a Kerr cell being used to modulate the intensity of the injecting light. The phase shift is determined by means of a compensatingRCcircuit which allows a direct reading of lifetime. The actual measurement is reduced to the setting of a variable resistor in such a way that an ellipse observed on the screen of a CRO degenerates into a straight line. The performance of the instrument is discussed for the case of a thin, rectangular filament illuminated on one of its large faces either homogeneously or in a narrow band.

ISSN:0034-6748    

DOI:10.1063/1.1716029

出版商:AIP    

年代:1958

数据来源: AIP

ISSN:0034-6748    

DOI:10.1063/1.1716030

出版商:AIP    

年代:1958

数据来源: AIP

ISSN:0034-6748    

DOI:10.1063/1.1716032

出版商:AIP    

年代:1958

数据来源: AIP

ISSN:0034-6748    

DOI:10.1063/1.1716033

出版商:AIP    

年代:1958

数据来源: AIP

ISSN:0034-6748    

DOI:10.1063/1.1716034

出版商:AIP    

年代:1958

数据来源: AIP