icon Kapiti gaigakaunta

icon bias

21 April 2011
I've increased the photomultiplier voltage from 478 Volts to 725 Volts, measured with a 10MΩ input meter. Still digging for the high voltage probe.
spectrum
Latest spectrum 24Aug2011

Increasing the voltage resulted in higher count rates, especially when testing samples, which overwhelmed the computer. I disabled the logging of every count and all seems well.

icon index

icontwin peaks - highest levels yet
2 Dec 2012
iconlatest - most recent data here
29Jun2017 10:31
iconreview - up to date
26 May 2012
iconAm241 v2.0 - smoke alarm redux: hot
28 April 2011
iconAm241 - smoke alarm false start
22 April 2011
iconbias - increased voltage from 478 to 725V
21 April 2011
iconprejudice - snapshot of record before voltage increase
21 April 2011
iconperspective - tritium in local waterways
21 April 2011
iconspectra - gallery of spectra 30Mar-17Apr
17 April 2011
iconfall - southerlies eat radiation
5 April 2011
icontop model - Norwegian atmospheric projector
5 April 2011
iconrain - it's hot up north
27 March 2011
iconbulk bins - fiddling with PRA
25 March 2011
iconlinks
24 March 2011
iconproduction - just another plot of background
24 March 2011
icondimension++ - first 10½ hour run
23 March 2011
iconforth - a better regulator, discovering PRA
22 March 2011
iconthe third day - looking at pulses
21 March 2011
icontutu - rock is cold
20 March 2011
iconguff - te ahi kaa
19 March 2011