pulsed, ppl. a.
(pʌlst)
[f. pulse v. + -ed1.]
a. Producing or involving pulses.
pulsed column: a tower for solvent extraction in which the natural countercurrent flow of the feed liquid and the solvent has mechanically superimposed on it a rapid reciprocating motion of small amplitude, in order to promote the extraction process.
| 1946 Radar: Summary Rep. & Harp Project (U.S. Nat. Defense Res. Comm., Div. 14) 143/1 Pulsed Doppler shift. 1949 Jrnl. R. Aeronaut. Soc. LIII. 439/1 A system employing secondary radar, i.e. a pulsed ground station working in conjunction with a responder, has been designed. 1958 Engineering 14 Feb. 205/3 The solvent and water solutions quickly separate after the mixing-contacting process, be this in a packed or pulsed countercurrent contactor column or a mixer-settler unit. 1972 McGraw-Hill Yearbk. Sci. & Technol. 268/1 Progress in the development of CW devices has spurred renewed interest in pulsed chemical lasers as..sources of the very-high-energy pulses..needed for plasma heating experiments. 1978 R. V. Jones Most Secret War ii. 16 In 1931 W. A. S. Butement and P. E. Pollard..had devised and made a pulsed radio system on a wavelength of about 50 centimetres for detecting ships. 1978 Nature 23 Mar. 298/3 Because oxide fuel is highly radioactive, the process is carried out in pulsed columns (rather than mixer settlers) to minimise the contact time between the solvent and the dissolved acid fuel. |
b. Consisting of pulses; in the form of pulses.
| 1949 Jrnl. R. Aeronaut. Soc. LIII. 438/1 (heading) Measurement of the density of the upper atmosphere by radar—pulsed violet or ultra-violet light. 1955 Friedman & Weisskopf in W. Pauli Niels Bohr 155 A pulsed initial neutron beam. 1957 F. Hoyle Black Cloud ix. 182 We ought to start sending pulsed messages on the one centimetre [wave-length]. 1971 Nature 16 Apr. 426/1 The X-rays from the hitherto unsurprising source Cygnus X-1 are pulsed at a rate of probably about 15 pulses per second. |