Search Publications
Ground calibrations of the Solar Intensity X-ray Spectrometer (SIXS) on board BepiColombo
Andersson, H.; Alha, L.; Huovelin, J. +4 more
In this paper we present the methods, results, and analysis of the BepiColombo SIXS instruments' ground calibrations. The aim of these calibrations was to characterize the performance of the three SIXS X-ray detectors to enable reliable spectral analysis of the solar X-ray data. The ground calibrations for characterizing the performance of the thr…
The effect of protons on the performance of second generation Swept Charge Devices
Gow, Jason P. D.; Holland, Andrew D.; Pool, Peter J. +1 more
The e2v technologies Swept Charge Device (SCD) was developed as a large area detector for X-ray Fluorescence (XRF) analysis, achieving near Fano-limited spectroscopy at -15 °C. The SCD was flown in the XRF instruments onboard the European Space Agency's SMART-1 and the Indian Space Research Organisation's Chandrayaan-1 lunar missions. The second g…
Simulated performance of a single pixel PIN spectrometer SCXM equipped with a concentrator optics in Solar coronal X-ray observations
Alha, L.; Huovelin, J.; Nevalainen, J.
In this paper we present simulated solar coronal X-ray observations to verify the sensitivity of a new hypothetical instrument design. These simulations are folded through this X-ray spectrometer having a moderate size circular field of view (FoV) of 1.6°. This SCXM (Solar Coronal X-ray Mapper) is designed to compose of a single pixel silicon PIN …
Calibration of the C1XS instrument on Chandrayaan-1
Howe, C. J.; Kellett, B. J.; Narendranath, S. +5 more
The Chandrayaan-1 X-ray spectrometer (C1XS) experiment on the Chandrayaan-1 mission was designed to carry out spectroscopic observations in the 1-10 keV range for deriving lunar chemistry. We present results from the ground calibration of the Swept Charge Devices (SCDs) on C1XS at the RESIK X-ray beam facility at Rutherford Appleton Laboratory, Ch…
Ground calibration of the Chandrayaan-1 X-ray Solar Monitor (XSM)
Andersson, H.; Grande, M.; Alha, L. +9 more
The Chandrayaan-1 XSM ground calibrations are introduced. The aim of these calibrations was to characterize the performance of XSM, which enables a reliable spectral analysis with the solar X-ray data. The calibrations followed an improved procedure based on our experience from the SMART-1 XSM. The most important tasks in the calibrations were det…
The effect of protons on the performance of swept-charge devices
Smith, David R.; Gow, Jason
The e2v technologies CCD54, or swept-charge device (SCD) has been extensively radiation tested for use in the Chandrayaan-1 X-ray Spectrometer (C1XS) instrument, to be launched as a part of the Indian Space Research Organisation (ISRO) Chandrayaan-1 payload in 2008. The principle use of the SCD is in X-ray fluorescence (XRF) applications, the devi…
The in-flight performance of the X-ray Solar Monitor (XSM) on-board SMART-1
Andersson, H.; Alha, L.; Huovelin, J. +4 more
The operation, performance, and in-flight calibrations of the X-ray Solar Monitor (XSM) on-board ESA's SMART-1 mission to the Moon are presented. The basic method of deriving the response and effective area of the XSM is described. The evolution of the energy resolution as a function of time is studied, and sample data of high quality broadband so…
Proton irradiation of swept-charge devices for the Chandrayaan-1 X-ray Spectrometer (C1XS)
Smith, D. R.; Gow, J.; Holland, A. D.
This paper presents work carried out in support of swept-charge device (SCD) characterisation for the Chandrayaan-1 X-ray Spectrometer (C1XS) instrument. A brief overview of the C1XS instrument is presented, followed by a description of SCD structure and operation. The SCD test facility and method of device characterisation using two different dri…
Radiation hardness studies for the X-ray Solar Monitor (XSM) onboard the ESA SMART-1 mission
Andersson, H.; Alha, L.; Huovelin, J. +7 more
The X-ray detection performance of the X-ray Solar Monitor (XSM, onboard the ESA SMART-1 satellite) Si pin -detector was studied after exposure to several types of radiation typical of the space environment (i.e. protons, electrons and γ -radiation). The detector withstands the tested radiation types at the expected mission dose levels. Hence, the…