Multi-coincidence ion detection system for EUV–FEL fragmentation experiments at SPring-8

Motomura, K.; Foucar, L.; Czasch, A.; Saitô, Norio; Jagutzki, O.; Schmidt‐Böcking, H.; Dørner, R.; Liu, X.-J.; Fukuzawa, H.; Prümper, G.; Ueda, Kiyoshi; Okunishi, M.; Shimada, Kozo; Harada, Tetsuo; Toyoda, Mitsuo; Yanagihara, Mihiro; Yamamoto, Masaki; Iwayama, H.; Nagaya, K.; Yao, Makoto; Rudenko, Artem; Ullrich, J.; Nagasono, Mitsuru; Higashiya, A.; Yabashi, Makina; Ishikawa, Tetsuya; Ohashi, Haruhiko; Kimura, Hiroaki

doi:10.1016/j.nima.2009.04.042

Cited by 39 publications

(34 citation statements)

References 14 publications

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“…9 Because the interpolation is done offline, other sophisticated peak detection algorithms such as constant fraction discrimination (CFD) can be applied. 18 However, interpolation on pulse waveforms alone is not sufficient to achieve sub-sampling accuracy. We need to take into consideration the trigger timing jitter, which is as large as the sampling period.…”

Section: A Time Interpolation Methodsmentioning

confidence: 99%

Communication: Time- and space-sliced velocity map electron imaging

Lee

Lin

Lingenfelter

et al. 2014

The Journal of Chemical Physics

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We develop a new method to achieve slice electron imaging using a conventional velocity map imaging apparatus with two additional components: a fast frame complementary metal-oxide semiconductor camera and a high-speed digitizer. The setup was previously shown to be capable of 3D detection and coincidence measurements of ions. Here, we show that when this method is applied to electron imaging, a time slice of 32 ps and a spatial slice of less than 1 mm thick can be achieved. Each slice directly extracts 3D velocity distributions of electrons and provides electron velocity distributions that are impossible or difficult to obtain with a standard 2D imaging electron detector. © 2014 AIP Publishing LLC. [http://dx

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Section: A Time Interpolation Methodsmentioning

confidence: 99%

Communication: Time- and space-sliced velocity map electron imaging

Lee

Lin

Lingenfelter

et al. 2014

The Journal of Chemical Physics

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“…All signals ͑six from the delayline anode plus the direct signals from the MCP͒ are fed to an eight-channel digitizer ͑Acqiris DC282 ϫ2͒ and software CFD ͑constant fraction discriminator͒ is employed for extracting the timing signals. 7 In this way, we minimize the deadtime of our detection system as described previously. 7 The signal from a gas monitor detector is also fed to the digitizer, as a measure of the laser power for each individual FEL shot during the experiments.…”

Section: Methodsmentioning

confidence: 99%

“…7 In this way, we minimize the deadtime of our detection system as described previously. 7 The signal from a gas monitor detector is also fed to the digitizer, as a measure of the laser power for each individual FEL shot during the experiments. Very recently, this device was absolutely calibrated using a cryogenic radiometer in a separate measurement.…”

Section: Methodsmentioning

confidence: 99%

“…The first evidence of multiphoton multiple ionization of N 2 by EUV pulses from the SCSS test accelerator was reported by Sato et al 5 Recently, we have demonstrated that this source is ideal to investigate molecular ionic excited states that are accessible only by sequential EUV photon absorption by the molecules, 6 by means of ion momentum spectroscopy using a multiparticle detection system. 7 In the work, dissociative ionization pathways leading into N + ͑O + ͒ and N 2+ ͑O 2+ ͒ ions, and N + -N + ͑O + -O + ͒ ion-pair formations from the N 2 ͑O 2 ͒ molecule were discussed.…”

Section: Ion-ion Coincidence Studies On Multiple Ionizations Of N 2 Amentioning

confidence: 99%

“…6,7 The photon energy employed in the present experiment was set to be in between single and double ionization thresholds of N 2 and O 2 , with twice the photon energy being above the double ionization thresholds. Thus, N 2 and O 2 are singly ionized by single-photon absorption, and ionized N 2 and O 2 can be further ionized or excited by absorption of additional photons.…”

Section: Ion-ion Coincidence Studies On Multiple Ionizations Of N 2 Amentioning

confidence: 99%

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Ion-ion coincidence studies on multiple ionizations of N2 and O2 molecules irradiated by extreme ultraviolet free-electron laser pulses

Yamada

Fukuzawa

Motomura

et al. 2010

The Journal of Chemical Physics

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We have investigated multiple ionization of N2 and O2 molecules by 52 nm extreme-ultraviolet light pulses at the free-electron laser facility SCSS in Japan. Coulomb break-up of parent ions with charge states up to 5+ is found by the ion-ion coincidence technique. The charge-state dependence of kinetic energy release distributions suggests that the electrons are emitted sequentially in competition with the elongation of the bond length.

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Strong‐Field Interactions at EUV and X‐Ray Wavelengths

Rudenko

2014

Attosecond and XUV Physics

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Multi-coincidence ion detection system for EUV–FEL fragmentation experiments at SPring-8

Cited by 39 publications

References 14 publications

Communication: Time- and space-sliced velocity map electron imaging

Communication: Time- and space-sliced velocity map electron imaging

Ion-ion coincidence studies on multiple ionizations of N2 and O2 molecules irradiated by extreme ultraviolet free-electron laser pulses

Strong‐Field Interactions at EUV and X‐Ray Wavelengths

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