On the geometrical design of integrated Micromegas detectors

Carballo, V.M. Blanco; Salm, Cora; Smits, Sander M.; Schmitz, Jurriaan; Chefdeville, M.; Graaf, H. van der; Timmermans, J.; Visschers, J.L.

doi:10.1016/j.nima.2007.01.108

Cited by 16 publications

(18 citation statements)

References 8 publications

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“…2 several advantages: the grid can be made very thin (down to 800 nm), the mesh holes can be aligned with the pads, so that the avalanche deriving from a primary electron is collected on a single pad and the size of the pillars can be made very homogenous and they are arranged such that no active area is covered. The production of these InGrids was pioneered and optimized by the University of Twente in collaboration with NIKHEF [8]. The ASIC was read out by the MUROS 2.1 [9] and the Pixelman software [10] was used to control the readout system.…”

Section: Description Of Detector and Experimental Setupmentioning

confidence: 99%

InGrid-based X-ray detector for low background searches

Krieger

Kamiński

Desch

2013

Nuclear Instruments and Methods in Physics Research Section A:

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Section: Description Of Detector and Experimental Setupmentioning

confidence: 99%

InGrid-based X-ray detector for low background searches

Krieger

Kamiński

Desch

2013

Nuclear Instruments and Methods in Physics Research Section A:

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“…Several 180 mm 2 InGrids of various geometries were realized on 10 cm diameter Silicon wafers and tested by means of 55 Fe quanta. For some of them, energy resolutions of 13 % FHWM and gain uniformities better than 3 % RMS were recorded [9]. The next step concerns the post processing of wafers of pixel readout chips which will be realized soon.…”

Section: Ingridmentioning

confidence: 99%

The pixel readout of Micro Patterned Gaseous Detectors

Chefdeville

2007

J. Phys.: Conf. Ser.

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Abstract. The use of pixel readout chips as highly segmented anodes of gaseous detectors offers high granularity and low noise at the input of each channel. This readout can be applied to TPCs for high energy particle tracking as well as for low energy recoil detection where a small charge is created in the gas volume. Detectors combining GEM or Micromegas amplification stages with pixel readout chips will be presented and their tracking capabilities described. IntroductionThe use of pixel readout chips as highly segmented anodes of micro-patterned gaseous detectors offers a few tens of microns granularity and a low noise at the input of each channel allowing the detection in three dimensions of single electrons with a potentially very good spatial resolution, with high rate capability and efficiency.These detectors are well suited for the detection of polarized photons and axions, as both radiations eventually end in a few-keV photo-electron conversion. The photo-electron being absorbed in the gas, its energy can be measured by counting the detected primary electrons; and its track may be resolved thanks to the fine segmentation of the anode. In the same way, the direction and energy of double -ß decay electrons could be measured, as well as the small ionization of low energy nuclear recoils from WIMP or neutrino interactions. This readout can also be applied to TPCs for high energy physic s experiments. In that case, the particle identification (dE/dx) could be improved by counting the primary clusters of electrons along a track and d-rays can be identified and isolated in the analysis. This paper will summarize the progress in Micromegas and GEM based pixelized detectors, describing their combination with the MediPix2 and TimePix pixel readout chips. Meanwhile, emphasis will be put on the on-chip integration of amplification and discharge protection structures.

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“…The pillars are very narrow and are easily hidden between the holes eliminating the dead area. Charge signal spectra of X-rays from an 55 Fe source measured with InGrid show a spectrum with a high resolution compared to other gaseous detectors [2]. Recently also, structures with two and three piled-up Micromegas foils have been produced in the same way.…”

Section: Introductionmentioning

confidence: 93%

“…amplification with Micromegas shows a strong exponential dependence on the applied voltage. But in contrast to this, the gas amplification does not depend much on the width of the amplification gap if the width is of the order of 50 mm [1,2].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, a more practical solution for mass production has been devised with InGrid where the width of the amplification gap and the alignment of the Micromegas holes to the pads of the ROC are better guaranteed. At the InGrid concept a Micromegas foil is created directly onto the chip by wafer post-processing [2,5]. This foil is fixed on the ROC surface by pillars of SU8 photo resist.…”

Section: Introductionmentioning

confidence: 99%

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