1964_IMPORT_AND_EXPORT_(STRATEGIC_COMMODITIES)_REGULATIONS — Page 137

1988 Ed.]

Import and Export (Strategic Commodities) Regulations

[CAP. 60

G 137

[Subsidiary]

(a) Josephson-effect devices;

IL 1584

IL 1585

(b) "Dayem bridges";

(c) Weak-link devices;

(d) "Proximity-effect devices";

(e) Phase slip devices;

(f) SNS (super-normal-super) bridges;

(g) SIS (superconductor-insulator-superconductor) devices;

(h) Quasiparticle devices or detectors.

Technical Notes:

1.

2.

By "Dayem bridges" are meant superconducting thin film devices with a reduced section area which acts as a conductive weak link. This weak link has a much lower critical current than the areas it joins. Dayem bridges can act as superconducting switches and may be employed in superconducting/quantum interference devices (squids).

By "proximity-effect devices” are meant superconducting weak link devices whose low critical current is due to an overlay of normal metal rather than a small area. These devices can be used for the same purpose as Dayem bridges.

Cathode-ray oscilloscopes and specially designed components therefor, including associated plug-in units, external amplifiers, preamplifiers and sampling devices, having any of the following characteristics-

(a) An amplifier or system bandwidth greater than 250 MHz (defined as the band of frequencies over which the deflection on the cathode-ray tube does not fall below 70.7 per cent of that at maximum point measured with a constant input voltage to the amplifier);

(b) A horizontal sweep speed faster than 1 nanosecond per cm with an accuracy (linearity) better than 2 per cent;

(c) Containing or designed for use with cathode-ray tubes covered by Item IL 1541(c);

(d) Ruggedized to meet a military specification;

(e) Rated for operation over an ambient temperature range of from below -25°C to above +55°C;

(f) Using sampling techniques for the analysis of recurring phenomena which increase the effective bandwidth of an oscilloscope or time-domain reflectometer to a frequency greater than 4 GHz;

(g) Digital oscilloscopes with sequential sampling of the input signal at an interval of less than 50 nanoseconds.

Explanatory Notes:

1. Nothing in the above shall be construed as sanctioning the export of technology, except technology for maintenance, repair and operation of oscilloscopes excluded from embargo under sub-item (a) above, which:

(a) Use cathode ray tubes embargoed by Item IL 1541(b); or

(b) Exceed an amplifier bandwidth of 200 MHz.

2. In the case of systems, the characteristics of individual plugins, probes or mainframes must not be in excess of what is required for overall system bandwidth.

Photographic equipment as follows--

(a) High speed cinema recording cameras and equipment as follows:

(1) Cameras in which the film is continuously advanced throughout the recording period, and which are capable of recording at framing rates exceeding 13,150 frames per second, using any camera and film combination from the standard 8 mm to the 90 mm size inclusive;

(2) Special optical or electronic devices which supplement, replace or are interchangeable with standard camera components for the purpose of increasing the number of frames per second;