Fast, real-time multichannel scaler, construction and applications

Zieliński, M.; Karasek, Krzysztof; Dygdala, Roman S.

doi:10.1063/1.1147415

Cited by 11 publications

(8 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Comstock, model TOF 101 mass spectrometer allowed us to resolve the Ca + ions, detected shot-to-shot by the tandem multichannel plate detector. The signal, which is composed of a train of pulses, is amplified [19] and passed to an input of a real-time multichannel scaler (RTMS) [20] or a LeCroy 9370, 1 GHz digital oscilloscope, co-working with a personal computer (PC), with a 100 MHz clock speed. Timing signals for the RTMS or for the oscilloscope are provided by a fast photodiode observing a reflection from the pump laser.…”

Section: Methodsmentioning

confidence: 99%

“…Figure 3 gives a partial energy level diagram of Ca showing the levels important in this experiment. Calcium atoms are excited from the 4s 2 1 S 0 ground state to the 4s6s 1 S 0 level at 41 786 cm −1 [20] by two photons from the pulsed dye laser. The excited atoms are photoionized by a third photon from the same laser and overcome the ionization limit of Ca (49 305 cm −1 [21]).…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

The plasma phenomena in three-photon ionization of Ca

Dygdala¹,

Karasek²,

Stefański

et al. 1999

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

The investigation of thresholds for the occurrence of the collective effects (plasma effects) in the two-photon resonant, 4s2 1 S0 to 4s6s 1 S0 , three-photon ionization of calcium atom is presented. Our experiments were carried out using an excimer/dye laser system scanned through the resonance two-photon transition. Ions and electrons were produced in an interaction region inside the vacuum chamber where the laser beam and atomic Ca beam intersect. The plasma effects (collective effects), i.e. the effects caused by the action of ions/electrons created in the interaction region on charges leaving that zone are highlighted and analysed. The yields and time-of-flight (TOF) distributions for ions produced in such three-photon ionization of atomic calcium have been investigated as a function of laser intensity and laser detuning. We present the results of simple theoretical models for the plasma effects such as 40 Ca+ and 44 Ca+ time separation in TOF distribution as well as a model based on atomic physics for the time shift and asymmetry of 40 Ca+ due to an increase of the laser intensity. These results are compared with experimental data which are obtained first time for such a heavy element in the periodic table.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

The plasma phenomena in three-photon ionization of Ca

Dygdala¹,

Karasek²,

Stefański

et al. 1999

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

show abstract

“…The zinc ions were detected shot-to-shot by the tandem multichannel plate (MCP) detector. The signal composed of a train of pulses is amplified [4] and fed to an input of a real time multichannel scaler (RTMS) [5,6]. In the case of a signal obtained from the multichannel plates when the laser saturate the plasma (the signal then is not composed of a train of countable pulses), the LeCroy 9370, 1GHz digital oscilloscope was used.…”

Section: Methodsmentioning

confidence: 99%

Time-of-flight repeller circuit application in laser ablation experiment

Dygdala

Zieliński

Płóciennik

et al. 2009

Surface and Coatings Technology

View full text Add to dashboard Cite

“…Previous reports show that researchers have designed photon-counting cards (multi-channel scaler: MCS) based on high-speed digital chips, which have a complex circuit structure. Marek Zieliński et al designed a real-time multichannel scaler with a high time resolution of 5 ns, but it supports a low laser repetition rate of 50 Hz (at 2 15 time channels) [ 16 , 17 ]. With the development of semiconductor technology, field-programmable gate array (FPGA) technology with high-speed parallel processing advantages has attracted more attention from researchers.…”

Section: Introductionmentioning

confidence: 99%

Design of Lidar Data Acquisition and Control System in High Repetition Rate and Photon-Counting Mode: Providing Testing for Space-Borne Lidar

Cheng

Xie

Zhao

et al. 2022

Sensors

View full text Add to dashboard Cite

For ground-based lidars in atmospheric observation, their data acquisition unit and control unit usually work independently. They usually require the cooperation of large-volume, high-power-consumption Industrial Personal Computer (IPC). However, the space-borne lidar has high requirements on the stability and integration of the acquisition control system. In this paper, a new data acquisition and lidar control system (DALCS) was developed based on System-on-Chip Field-Programmable Gate Array (SoC FPGA) technology. It can be used in lidar systems with high repetition rate and photon-counting mode and has functions such as data storage, laser control, automatic collimation, wireless communication, and fault self-test. DALCS has two working modes: in online mode, the echo data collected by DALCS are transmitted to the computer for display in real-time and then stored with the current time as the file name; in offline mode, the data are stored in local non-volatile memory, which can be read remotely and can work autonomously when there is no IPC. The test results showed that in the frequency range of 0–70 M, the counting linearity of DALCS reached 0.9999, and the maximum relative error between the DALCS card and the standard signal source was 0.211%. The comparison results showed that the correlation coefficient between DALCS and MCS-PCI was as high as 0.99768. The DALCS was placed in a self-developed lidar sensor system for continuous observation, and the system worked stably under different weather conditions. The range-squared-corrected signal profiles obtained from the observations reflect the spatial and temporal distribution characteristics of aerosols and clouds well. This provides scheme verification and experimental support for the development of space-borne lidar data acquisition and control system.

show abstract

Fast, real-time multichannel scaler, construction and applications

Cited by 11 publications

References 13 publications

The plasma phenomena in three-photon ionization of Ca

The plasma phenomena in three-photon ionization of Ca

Time-of-flight repeller circuit application in laser ablation experiment

Design of Lidar Data Acquisition and Control System in High Repetition Rate and Photon-Counting Mode: Providing Testing for Space-Borne Lidar

Contact Info

Product

Resources

About