A Computer-Controlled Photometer and Polarimeter

A polarimeter for IXO

The X-ray POLarimeter (XPOL) is an instrument that will fly on-board the International X-ray Observatory (IXO). We will describe the XPOL setup in IXO and we will compare the IXO requirements with the actual prototype performance. The environmental tests performed on the XPOL prototype (thermo-vacuum, vibration and heavy ions irradiation) show that this technology is ready for a space applicati...

Comparing live lecture, internet-based & computer-based in-struction: A randomized controlled trial

  Background :Comparing computer and internet based instruction with traditional giving lecture would provide enough evidence to identify best teaching practice. In this study, we compared lecture, interactive internet based and computer based learning regarding medical students' knowledge acquisition and satisfaction in teaching pathophysiology of hematology and oncology.   Methods : Eighty fo...

A simple optical electron polarimeter

It is pointed out that heavy atoms (i.e. those which have spectroscopically resolvable fine structure) are not required for optical measurements of electron polarisation. A polarimeter which uses helium gas instead of heavy-metal vapour is proposed, and several experimental details are discussed. Optical detection of electron polarisation was first proposed more than a decade ago by Farago and ...

A lithium internal-standard flame photometer.

A vector polarimeter at MAMI

Atomic bremsstrahlung-polarisation correlation between incoming electrons and outgoing photons may allow to design a polarimeter capable of measuring all components of beam polarisation simultaneously. This device can be called a vector polarimeter. It might allow to test theoretical predictions of correlation coefficients between 1 and 3.5 MeV as well as work as a beam diagnostics device. As a...