The first generation of Swept Charge Device (SCD) the e2v technologies plc CCD54 was used in the Demonstration of a Compact Imaging X-ray Spectrometer (D-CIXS) launched in 2003 and again in the Chandrayaan-1 X-ray Spectrometer (C1XS) instrument currently in orbit around the Moon. The main source of decreased energy resolution in both cases is proton damage, from trapped and solar protons respec...

The response of a la rge-crystal sodium-iodide spectrometer was studied fo[' individual monoenergetic electrons extracted from a 50-million-electron-volt betatron operatcd between 1 a nd 20 Mev. The energy resolut ion with crystals 5 inches in diameter by 4 inches in length a nd 5 inches in diameter by 9 inches in length reaches its optimum value fo r electrons of 6 Mev where t he total width o...

Introduction Using the Alpha Particle X-ray Spectrometer (APXS) (see Fig.1) on board Spirit and Opportunity rovers on MER mission, we were able to measure the argon density variation in the martian atmosphere as a function of seasonal changes. Due mainly to the variation of the temperature as a function of season on martian poles, the air mass on Mars is constantly moving from North pole to Sou...

A method of measuring gamma-ray relative intensities was developed which used a germanium .bent-crystal spectrometer as a monochromator. The response function of a Nai detector to the essentially monoenergetic gamma rays, obtained from the diffracted beam of the spectrometer, was recorded in a multichannel analyzer. The composite spectrum due to all the gamma rays was then recorded in the analy...