摘要:

An automatic compensation method is applied to ESR measurements, and the corresponding addition to a standard spectrometer permits the measurement of the resonant magnetic susceptibility independently of microwave power level, magnetic field modulation amplitude, amplifier gain, etc. A calibration of the instrument is described. Using this, one obtains an accuracy in the measurement of the susceptibility of approximately 0.1%.

ISSN:0034-6748    

DOI:10.1063/1.1686314

出版商:AIP    

年代:1973

数据来源: AIP

摘要:

The laser‐triggered switching of a 575 kV, Van de Graaff charged, high‐pressure, gas‐filled spark gap is described. Subnanosecond switch jitter could be maintained with laser powers of only 10 MW. The application of this technique to repetitive switching of high‐voltage, pulse‐power systems with nanosecond delay and subnanosecond jitter is considered.

ISSN:0034-6748    

DOI:10.1063/1.1686315

出版商:AIP    

年代:1973

数据来源: AIP

摘要:

An optical cell, which has been used for studies of liquefied gases at temperatures from 78 to 350 K and at pressures up to 10 MN/m2, is described. The cell features a reusable, metal, C‐type sealing ring.

ISSN:0034-6748    

DOI:10.1063/1.1686316

出版商:AIP    

年代:1973

数据来源: AIP

摘要:

The effects of a longitudinal magnetic field on the performance of a channel electron multiplier are studied and the gain variation due to the magnetic field is explained by considering hopping and gyrating motion of electrons.

ISSN:0034-6748    

DOI:10.1063/1.1686317

出版商:AIP    

年代:1973

数据来源: AIP

摘要:

It is shown how a low‐voltage regulated power supply, which can operate from a limited supply voltage of 6 V or less, can be designed making use of a silicon‐germanium transistor pair as voltage reference element in a novel circuit configuration. Pair selection efforts are not required, and the temperature coefficient can be assigned beforehand through design calculations and a single output voltage adjustment. The circuit example shown is able to function with an input‐output voltage differential of only a few tenths of a volt and its temperature compensation is effective between − 30° and + 85°C.

ISSN:0034-6748    

DOI:10.1063/1.1686318

出版商:AIP    

年代:1973

数据来源: AIP

摘要:

A simple procedure is described that allows high‐resolution transmission electron microscopy of strongly ferromagnetic specimens in the Philips EM 200. The electromagnetic beam tilt device of the microscope is used to compensate for the interaction of the electron beam with the magnetization of the specimen. Using this method, even relatively massive magnetic samples can be examined.

ISSN:0034-6748    

DOI:10.1063/1.1686319

出版商:AIP    

年代:1973

数据来源: AIP

摘要:

A device is constructed for plasma studies which calculates the Fourier coefficients and power spectral densities of spatially periodic signals and displays their time variations on oscilloscopes with large signal bandwidth of dc to 10 MHz.

ISSN:0034-6748    

DOI:10.1063/1.1686320

出版商:AIP    

年代:1973

数据来源: AIP

摘要:

A simple preamplifier is described which allows one to simultaneously measure ac and dc signals from electron multipliers operating several thousand volts above ground potential.

ISSN:0034-6748    

DOI:10.1063/1.1686321

出版商:AIP    

年代:1973

数据来源: AIP

摘要:

A coupling which facilitates the union of RG‐174 to microcoaxial cable is described. Features of the coupling involve a superfluid seal to the microcoax and electrical connections which do not require special handling.

ISSN:0034-6748    

DOI:10.1063/1.1686322

出版商:AIP    

年代:1973

数据来源: AIP

摘要:

A simple, readily implemented method of changing the optical phase of the reference beam is described. A thin glass microscope coverslip is obliquely introduced into the beam. Slight tilting, which can be effected in complete darkness, produces the controlled phase change.

ISSN:0034-6748    

DOI:10.1063/1.1686323

出版商:AIP    

年代:1973

数据来源: AIP