scholarly journals Field measurements of thorium and uranium in lujavrites from the Ilímaussaq intrusion

1971 ◽  
Vol 35 ◽  
pp. 27-29
Author(s):  
P Sørensen
Keyword(s):  
Single Channel ◽  
Pulse Height ◽  
Field Measurements ◽  
Uranium Content ◽  
Small Areas ◽  
Pulse Height Analyser ◽  
Channel Pulse Height Analyser

During last summer 3388 field measurements of the thorium and uranium content of the lujavrites from the Ilimaussaq intrusion were carried out with a portable spectrometer (Løvborg, 1967; Løvborg et al. 1968; Løvborg et al. in press) consisting of a seintillation detector and a single-channel pulse-height analyser. Within selected small areas measurements were made at the joints of a 1m grid.

A simple 10*10 channel pulse height analyser

1976 ◽  
Vol 9 (8) ◽  
pp. 626-628
Author(s):  
G P Agarwal ◽  
R Chandrasekhar ◽  
S K David ◽  
Y W Pande
Keyword(s):  
Pulse Height ◽  
Pulse Height Analyser ◽  
Channel Pulse Height Analyser

The Damage Capacity of Cavitating Flow From Pulse Height Analysis

1989 ◽  
Vol 111 (4) ◽  
pp. 502-509 ◽  
Author(s):  
S. A. Fry
Keyword(s):  
Circular Cylinder ◽  
Pulse Height ◽  
Pulse Amplitude ◽  
Flow Conditions ◽  
Noise Levels ◽  
Linear Calibration ◽  
Cavitation Noise ◽  
Pulse Height Analyser ◽  
Pulse Height Analysis ◽  
Digital Pulse

Digital pulse amplitude acquisition systems are reviewed and an analogue pulse height analyser (PHA) is described. Cavitation experiments are reported in which pressure pulses in the liquid (water) are picked up by a flush mounted pressure transducer and measured using the PHA. Tests were carried out on two cavitation sources: a 60 deg symmetric wedge and a circular cylinder. Despite generating similar r.m.s. noise levels the wedge is 21 times as damaging as the circular cylinder at peak noise flow conditions (at V = 16 m/s). By imposing thresholds on the spectra parameters it had been possible to find a linear calibration beween noise and erosion applicable to both cavitation sources over a range of flow velocities. A good correlation between cavitation noise and erosion was found by simply measuring the number of pulses above a suitable threshold.

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