摘要:

The method worked out previously for correcting distortions which affect the apparent shape of a continuous beta‐spectrum has been further extended. A general solution of the integral equation governing the relation between the true and the observed spectra is given, and is applied to the correction of the experimental spectra from a 1‐mg/cm2source of Cu64. The kernel of the distortion integral equation is determined from a study of the internal conversion lines of I131(47 and 330 kev) using sources of various thicknesses from 0.042 to 0.840 mg/cm2. It is found that the discrepancy between the experimental Cu64negatron and positron spectra and those predicted by the Fermi (``allowed'') theory can be completely understood as a thick source effect.

ISSN:0034-6748    

DOI:10.1063/1.1745612

出版商:AIP    

年代:1950

数据来源: AIP

摘要:

The investigation of electrons of all possible initial phases and phase velocities at transition between betatron and synchrotron phases of an electron synchrotron has been undertaken with a view toward determining the effect of different ways of applying the r‐f. It has been found that for an average accelerator there is an advantage in a moderately slow increase of the voltage from zero to its final value, while for the extreme case where particles enter the transition region with large phase velocity, an asymptotic final radial oscillation amplitude is reached which is independent of the manner in which the voltage is applied, provided only that it is applied adiabatically.

ISSN:0034-6748    

DOI:10.1063/1.1745613

出版商:AIP    

年代:1950

数据来源: AIP

摘要:

This article describes equipment which is being used for measuring and recording rapid fluctuations in the refractive index of the atmosphere.

ISSN:0034-6748    

DOI:10.1063/1.1745614

出版商:AIP    

年代:1950

数据来源: AIP

摘要:

A combination instrument consisting of a two‐circle goniometer and x‐ray spectrometer suitable for the study of crystals was designed and fabricated in Squier Signal Laboratory. A crystal can be oriented optically by using the instrument as a goniometer. X‐ray techniques can then be used to study the crystal by replacing the collimator and telescope with an x‐ray slit system and a Geiger counter. Absolute intensity measurements can be made by fixing the Geiger counter at twice the Bragg angle and rotating the crystal at 8° per hour from &thgr;Bragg—&Dgr;&thgr; to &thgr;Bragg+&Dgr;&thgr;. Back reflection angles of up to 160° are obtainable. The result of a test on synthetic halite (400) reflection, gave a structure factor 12.7 compared with Max Renniger's value of 12.67. No absorption corrections are required with this technique of measuring intensities.

ISSN:0034-6748    

DOI:10.1063/1.1745615

出版商:AIP    

年代:1950

数据来源: AIP

摘要:

The construction and operation of a flux‐biased 80‐Mev betatron is described. This betatron was built as a model to test design features later to be incorporated in a 300‐Mev betatron. Particular attention is paid to factors influencing design and to considerations of magnetic problems which are common to betatrons and synchrotrons such as the construction of field magnets which are uniform, the testing of fields at injection time, the mechanism of electron capture, and the influence of field inhomogeneities. The dimensions and operating characteristics are included together with many comparisons with the 300‐Mev betatron.

ISSN:0034-6748    

DOI:10.1063/1.1745616

出版商:AIP    

年代:1950

数据来源: AIP

摘要:

A relatively simple and inexpensive machine for mechanical computation of the autocorrelation function is described. The original design resulted from a collaboration with Dr. George P. Wadsworth of the Massachusetts Institute of Technology.The theoretical definition of the autocorrelation function is given. This is followed by an outline of the hand computational procedure as applied in this laboratory to observational (ocean wave) data of finite scope. The machine computation is next compared with the hand process.

ISSN:0034-6748    

DOI:10.1063/1.1745617

出版商:AIP    

年代:1950

数据来源: AIP

摘要:

Various types of flowmeters are discussed with reference to their use at very small flows. The differential pressure type, using rubber membranes, appears most suitable. The steps are outlined in the design of an instrument sensitive to flows as low as 0.01 ml/min. yet with a response time less than 10 sec. In this instrument a completely differential linkage between two membranes is accomplished by the use of an incompressible fluid. The theory of the response is developed. This gives a prediction of the speed of response from the sensitivity and the diameter of the membrane used.

ISSN:0034-6748    

DOI:10.1063/1.1745618

出版商:AIP    

年代:1950

数据来源: AIP

ISSN:0034-6748    

DOI:10.1063/1.1745620

出版商:AIP    

年代:1950

数据来源: AIP

ISSN:0034-6748    

DOI:10.1063/1.1745621

出版商:AIP    

年代:1950

数据来源: AIP

ISSN:0034-6748    

DOI:10.1063/1.1745622

出版商:AIP    

年代:1950

数据来源: AIP