Multichannel reconfigurable measurement system for hot plasma diagnostics based on GEM-2D detector

Wojeński, Andrzej; Kasprowicz, G.; Poźniak, Krzysztof T.; Byszuk, A.; Chernyshova, M.; Czarski, Tomasz; Jabłoński, Sławomir; Juszczyk, B.; Zienkiewicz, P.

doi:10.1016/j.nimb.2015.06.022

Cited by 30 publications

(8 citation statements)

References 9 publications

(11 reference statements)

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“…Its main advantage is a high number of input channels, combined with a systems' modularity. The paper presents the overall system architecture with the description of the designed key hardware components: AFE, ADB, FPGA backplane and PCI-E switch boards [4] and implemented advanced firmware for data registration and processing.…”

Section: Discussionmentioning

confidence: 99%

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FPGA-based GEM detector signal acquisition for SXR spectroscopy system

et al. 2016

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The presented work is related to the Gas Electron Multiplier (GEM) detector soft X-ray spectroscopy system for tokamak applications. The used GEM detector has one-dimensional, 128 channel readout structure. The channels are connected to the radiation-hard electronics with configurable analog stage and fast ADCs, supporting speeds of 125 MSPS for each channel. The digitalized data is sent directly to the FPGAs using fast serial links. The preprocessing algorithms are implemented in the FPGAs, with the data buffering made in the on-board 2Gb DDR3 memory chips. After the algorithmic stage, the data is sent to the Intel Xeon-based PC for further postprocessing using PCI-Express link Gen 2. For connection of multiple FPGAs, PCI-Express switch 8-to-1 was designed. The whole system can support up to 2048 analog channels. The scope of the work is an FPGA-based implementation of the recorder of the raw signal from GEM detector. Since the system will work in a very challenging environment (neutron radiation, intense electro-magnetic fields), the registered signals from the GEM detector can be corrupted. In the case of the very intense hot plasma radiation (e.g. laser generated plasma), the registered signals can overlap. Therefore, it is valuable to register the raw signals from the GEM detector with high number of events during soft X-ray radiation. The signal analysis will have the direct impact on the implementation of photon energy computation algorithms. As the result, the system will produce energy spectra and topological distribution of soft X-ray radiation. The advanced software was developed in order to perform complex system startup and monitoring of hardware units. Using the array of two onedimensional GEM detectors it will be possible to perform tomographic reconstruction of plasma impurities radiation in the SXR region.

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Section: Discussionmentioning

confidence: 99%

“…All of the settings including gain, offset correction and coupling mode needs to be tuned in order to achieve the highest dynamic range of the signal, matching the ADC input range. More details about the construction of the system can be also found in following publications [4,[6][7][8].…”

Section: System Componentsmentioning

confidence: 99%

FPGA-based GEM detector signal acquisition for SXR spectroscopy system

et al. 2016

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“…The multi-channel measurement system based on GEM detector is developed for SXR diagnostics tokamak plasmas [4]. The system is modular with up to 256 measurement channels (figure 2).…”

Section: Multi-channel Measurement Systemmentioning

confidence: 99%

Measuring issues in the GEM detector system for fusion plasma imaging

et al. 2018

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A measurement systems based on GEM (Gas Electron Multiplier) detectors is developed for X-ray diagnostics of tokamak plasmas. The multi-channel setup is designed for evaluation the X-ray source distribution in energy, space and time. The paper deals with the development of a fast analysis and elaboration of collected data, including charge cluster identification and the separation of coincided signals. The proposed algorithm can be applied iteratively for series of superimposed pulses. On-line separation of overlapped signals was implemented applying the FPGA (FPGA— Field-Programmable Gate Array) technology with relatively simple firmware processing. We demonstrate reconstruction of coinciding signals and retrieval of radiation source properties and energy spectra.

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“…ADCs interfaces, offset calibration circuits). Apart from the configuration part, several algorithms for the data processing were implemented [8]. Figure 2 presents main data-flow architecture for fast data acquisition, including:…”

Section: Fpga Firmware and Implemented Algorithms For Fast Data Acquimentioning

confidence: 99%

Fast Data Acquisition Measurement System For Plasma Diagnostics Using Gem Detectors

Wojeński¹,

Poźniak²,

Kasprowicz³

et al. 2016

Proceedings of 1st EPS Conference on Plasma Diagnostics — PoS(ECPD2015)

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This paper refers to measurement system for plasma diagnostics for tokamaks currently being developed. For the most of the GEM detector readout structures, large number of input channels is required to form a working measurement system. This constraint is especially important for two-dimensional GEM readout structures. Presented measurement system layout is a general model for further implementation. The system is based on fast serial gigabit links and PCI-Express interface for communication. The system can support up to 512 measurement channels, per each PCI-Express x16 slot. The system consists of several modules -PCI-Express 8-to-1 switch, Analog Front End, ADC Front End, and FPGA backplane boards. Implemented data processing algorithms enable fast raw data acquisition and real-time processing. The integration algorithms allow measurement system to cooperate with GEM detector working at high rates.

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Multichannel reconfigurable measurement system for hot plasma diagnostics based on GEM-2D detector

Cited by 30 publications

References 9 publications

FPGA-based GEM detector signal acquisition for SXR spectroscopy system

FPGA-based GEM detector signal acquisition for SXR spectroscopy system

Measuring issues in the GEM detector system for fusion plasma imaging

Fast Data Acquisition Measurement System For Plasma Diagnostics Using Gem Detectors

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