2006–2007 var detta en teknisk blogg, bl.a. om en vacuumkammare. 2008–2013 var temat idépolitik, främst ekonomisk demokrati. 2017–2018 var det en dagbok från Uppsalas plan- och byggnadsnämnd. Nu: Basemba – riffrock med ruff.
2006-01-26
focal length 15mm
the möller group have made a rough estimate of the focal length on beamline (bl) 2, observing the ratio of Ar++ vs Ar+ (which has a non-linear response) in an atomic beam vs beam axis. the rayleigh length was determined to be about 15mm.
