Abstract The RHIC interaction rate at sPHENIX will reach around 3 MHz in pp collisions and requires the detector readout to reject events by a factor of over 200 to fit the DAQ bandwidth of 15 kHz. ...Some critical measurements, such as heavy flavor production in pp collisions, often require the analysis of particles produced at low momentum. This prohibits adopting the traditional approach, where data rates are reduced through triggering on rare high momentum probes. We explore a new approach based on real-time AI technology, adopt an FPGA-based implementation using a custom designed FELIX-712 board with the Xilinx Kintex Ultrascale FPGA, and deploy the system in the detector readout electronics loop for real-time trigger decision.
A liquid hydrogen target for the MUSE experiment at PSI Roy, P.; Corsetti, S.; Dimond, M. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
01/2020, Letnik:
949, Številka:
C
Journal Article
Recenzirano
Odprti dostop
A 280ml liquid hydrogen target has been constructed and tested for the MUSE experiment at PSI to investigate the proton charge radius via simultaneous measurement of elastic muon–proton and elastic ...electron–proton scattering. To control systematic uncertainties at a sub-percent level, strong constraints were put on the amount of material surrounding the target and on its temperature stability. The target system was successfully operated during a commissioning run at PSI at the end of 2018. The target temperature was stable at the 0.01K level. This suggests a density stability at the 0.02% level, which is about a factor of ten better than required.
The MUon Scattering Experiment, MUSE, at the Paul Scherrer Institute, Switzerland, investigates the proton charge radius puzzle, lepton universality, and two-photon exchange, via simultaneous ...measurements of elastic muon-proton and electron-proton scattering. The experiment uses the PiM1 secondary beam channel, which was designed for high precision pion scattering measurements. We review the properties of the beam line established for pions. We discuss the production processes that generate the electron and muon beams, and the simulations of these processes. Simulations of the π/μ/e beams through the channel using TURTLE and G4beamline are compared. The G4beamline simulation is then compared to several experimental measurements of the channel, including the momentum dispersion at the intermediate focal plane and target, the shape of the beam spot at the target, and timing measurements that allow the beam momenta to be determined. Finally, we conclude that the PiM1 channel can be used for high precision π, μ, and e scattering.
A liquid hydrogen target for the MUSE experiment at PSI Roy, P.; Corsetti, S.; Dimond, M. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
01/2020, Letnik:
949
Journal Article
A liquid hydrogen target for the MUSE experiment at PSI Roy, P.; Corsetti, S.; Dimond, M. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
01/2020, Letnik:
949, Številka:
C
Journal Article
Recenzirano
A 280 ml liquid hydrogen target has been constructed and tested here for the MUSE experiment at PSI to investigate the proton charge radius via simultaneous measurement of elastic muon–proton and ...elastic electron–proton scattering. To control systematic uncertainties at a sub-percent level, strong constraints were put on the amount of material surrounding the target and on its temperature stability. The target system was successfully operated during a commissioning run at PSI at the end of 2018. The target temperature was stable at the 0.01 K level. This indicates a density stability at the 0.02% level, which is about a factor of ten better than required.
Timing detectors with SiPM read-out for the MUSE experiment at PSI Rostomyan, T.; Cline, E.; Lavrukhin, I. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
01/2021, Letnik:
986, Številka:
C
Journal Article
Recenzirano
Odprti dostop
The Muon Scattering Experiment at the Paul Scherrer Institute uses a mixed beam of electrons, muons, and pions, necessitating precise timing to identify the beam particles and reactions they cause. ...We describe the design and performance of three timing detectors using plastic scintillator read out with silicon photomultipliers that have been built for the experiment. The Beam Hodoscope, upstream of the scattering target, counts the beam flux and precisely times beam particles both to identify species and provide a starting time for time-of-flight measurements. The Beam Monitor, downstream of the scattering target, counts the unscattered beam flux, helps identify background in scattering events, and precisely times beam particles for time-of-flight measurements. The Beam Focus Monitor, mounted on the target ladder under the liquid hydrogen target inside the target vacuum chamber, is used in dedicated runs to sample the beam spot at three points near the target center, where the beam should be focused.
The RHIC interaction rate at sPHENIX will reach around 3 MHz in pp collisions and requires the detector readout to reject events by a factor of over 200 to fit the DAQ bandwidth of 15 kHz. Some ...critical measurements, such as heavy flavor production in pp collisions, often require the analysis of particles produced at low momentum. This prohibits adopting the traditional approach, where data rates are reduced through triggering on rare high momentum probes. We explore a new approach based on real-time AI technology, adopt an FPGA-based implementation using a custom designed FELIX-712 board with the Xilinx Kintex Ultrascale FPGA, and deploy the system in the detector readout electronics loop for real-time trigger decision.
We report the $p+p$ and $p+d$ differential cross sections measured in the
SeaQuest experiment for $J/\psi$ and $\psi\left(2S\right)$ production at 120
GeV beam energy covering the forward $x$-Feynman ...($x_F$) range of $0.5 < x_F
<0.9$. The measured cross sections are in good agreement with theoretical
calculations based on the nonrelativistic QCD (NRQCD) using the long-distance
matrix elements deduced from a recent global analysis of proton- and
pion-induced charmonium production data. The $\sigma_{\psi\left(2S\right)} /
\sigma_{J/\psi}$ cross section ratios are found to increase as $x_F$ increases,
indicating that the $q \bar{q}$ annihilation process has larger contributions
in the $\psi\left(2S\right)$ production than the $J/\psi$ production. The
$\sigma_{pd}/2\sigma_{pp}$ cross section ratios are observed to be
significantly different for the Drell-Yan process and $J/\psi$ production,
reflecting their different production mechanisms. We find that the
$\sigma_{pd}/2\sigma_{pp}$ ratios for $J/\psi$ production at the forward $x_F$
region are sensitive to the $\bar{d}/ \bar{u}$ flavor asymmetry of the proton
sea, analogous to the Drell-Yan process. The transverse momentum ($p_T$)
distributions for $J/\psi$ and $\psi\left(2S\right)$ production are also
presented and compared with data collected at higher center-of-mass energies.
A 280 ml liquid hydrogen target has been constructed and tested for the MUSE experiment at PSI to investigate the proton charge radius via simultaneous measurement of elastic muon-proton and elastic ...electron-proton scattering. To control systematic uncertainties at a sub-percent level, strong constraints were put on the amount of material surrounding the target and on its temperature stability. The target cell wall is made of \(120\,\mu\)m-thick Kapton, while the beam entrance and exit windows are made of \(125\,\mu\)m-thick aluminized Kapton. The side exit windows are made of Mylar laminated on aramid fabric with an areal density of \(368\,\)g/m\(^2\). The target system was successfully operated during a commissioning run at PSI at the end of 2018. The target temperature was stable at the 0.01 K level. This suggests a density stability at the \(0.02\,\)% level, which is about a factor of ten better than required.
The MUon Scattering Experiment, MUSE, at the Paul Scherrer Institute, Switzerland, investigates the proton charge radius puzzle, lepton universality, and two-photon exchange, via simultaneous ...measurements of elastic muon-proton and electron-proton scattering. The experiment uses the PiM1 secondary beam channel, which was designed for high precision pion scattering measurements. We review the properties of the beam line established for pions. We discuss the production processes that generate the electron and muon beams, and the simulations of these processes. Simulations of the \(\pi\)/\(\mu\)/\(e\) beams through the channel using TURTLE and G4beamline are compared. The G4beamline simulation is then compared to several experimental measurements of the channel, including the momentum dispersion at the IFP and target, the shape of the beam spot at the target, and timing measurements that allow the beam momenta to be determined. We conclude that the PiM1 channel can be used for high precision \(\pi\), \(\mu\), and \(e\) scattering.
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