Conveners
Young Scientists' Forum: Accelerator design and technologies
- Tomas Rogelio (CERN)
Young Scientists' Forum: Experiments and facilities
- Rickard Strom
Young Scientists' Forum: Calorimetry
- Andreas Maier (CERN)
Young Scientists' Forum: Physics
- Iouri Tikhonov (BINP)
Young Scientists' Forum: Software and Computing
- Marko Petric (CERN)
Young Scientists' Forum: Accelerator design and technologies
- John Jowett (CERN)
Young Scientists' Forum: Accelerator design and technologies
- Evgeny Levichev (Budker Institute of Nuclear Physics)
Young Scientists' Forum: Tracking and particle ID detectors
- Eva Sicking (University of Freiburg)
Young Scientists' Forum: Accelerator design and technologies
- Sergey Serednyakov (Budker Institute of Nuclear Physics)
Mr
Marco Alan Valdivia García
(CERN)
22/08/2016, 10:20
Direct Higgs production in e+e− collisions at the FCC is of interest if the centre-of-mass energy spread can be reduced by at least an order of magnitude. A monochromatization scheme, to accomplish this, can be realized with horizontal dispersion of opposite sign for the two colliding beams at the interaction point (IP). We recall histor- ical approaches to monochromatization, then derive a...
Mr
Salim Ogur
(CERN)
22/08/2016, 10:40
Accelerator design and technologies
CERN’s new ambitious project, Future Circular Collider-ee, will have 4 operations as Z, W, H and tt factories covering energy from 45.6 to 175 GeV. The main challenge of Z operation is to get high current as 1450 mA which will heavily depend on the injector. For this reason, we conclude that we need high bunch charge of 3.3E10 both for e- and e+, and fill 91500 of each of those bunches into...
Mr
özgür etisken
(Ankara University)
22/08/2016, 11:00
Accelerator design and technologies
The FCC-ee injector complex needs to produce and to transport a high-intensity e+/e- beam at a fast repetition rate of about 0.1 Hz for topping up the collider at its collision energy. A basic parameter set exists for all the collider energies, assuming a 10 GeV linac operating with a large number of bunches being accumulated in the existing SPS, which serves as pre-accelerator and damping...
Mr
Fabien Plassard
(CERN)
22/08/2016, 11:20
Accelerator design and technologies
Mitigation of static and dynamic imperfections for emittance preservation is one the most important and challenging task faced by the CLIC BDS. A simulations campaign has been performed in order to recover the nominal luminosity by means of different alignment procedures. The state of the art of the tuning studies is drawn up. Comparative studies of the tuning performances for the various...
Mr
Marcin Patecki
(CERN)
22/08/2016, 11:40
Accelerator design and technologies
The nanometer beam size in the interaction point (IP) is required for future linear colliders in order to achieve the required rate of particle collisions. The goal of the ultra-low β∗ study is to lower the IP vertical beam size by lowering the βy* value. The experimental part of this project is being performed in KEK Accelerator Test Facility (ATF2) where the beamline design and conditions...
Mr
Florian Pitters
(CERN)
22/08/2016, 16:00
Physics and computing
CLIC is a concept for a future linear collider that would provide e+e- collisions at a centre-of-mass energy of up to 3 TeV. The physics aims require a detector system with excellent jet energy and track momentum resolution, highly efficient flavour-tagging and lepton identification capabilities, full geometrical coverage extending to low polar angles and timing information in the order of...
James Kahn
(LMU München)
22/08/2016, 16:20
Physics and computing
Set to begin data taking at the end of 2018, the Belle II experiment is the next-generation B-factory experiment hosted at KEK in Tsukuba, Japan. The experiment represents the cumulative effort from the collaboration of experimental and detector physics, computing, and software development. Taking everything learned from the previous Belle experiment, which ran from 1998 to 2010, Belle II aims...
Ms
Dima El Khechen
(LAL)
22/08/2016, 16:40
Accelerator design and technologies
The SuperKEKB e+e- collider aims to reach a very high luminosity of 8 10^35 cm−2 s−1, using ultra-low emittance bunches colliding every 4ns and focused to unprecedented small vertical sizes thanks to a new "nano-beam" technique. Fast luminosity monitoring is required for luminosity feedback and optimisation in the presence of dynamic errors. The aimed relative precision is 10−3 in 1ms, which...
Mr
Dmitry Matvienko
(BINP)
22/08/2016, 17:20
Detector design and technologies
The Belle II calorimeter (at least, its barrel part) consists of
CsI(Tl) scintillation crystals which have been used at the Belle
experiment. We perform the radiation hardness study of some typical
Belle crystals and conclude their light output reductions are
acceptable for Belle II experiment where the absorption dose can reach
10 krad during the detector operation. CsI(Tl) crystals have...
Mr
evgeny kozyrev
(Budker Institute of Nuclear Physics SB RAS)
22/08/2016, 17:40
Detector design and technologies
We developed method of thin scintillator films preparation based on thermal CsI(Tl) deposition on glass substrates. The influence of deposition conditions on the micro columnar structure and crystalline property of the films was studied by scattering electron microscopy. The element composition was investigated by X-ray fluorescence method. We measured light output and spacial resolution as a...
Mr
Ilya Surin
(Budker INP)
22/08/2016, 18:00
Detector design and technologies
The Spherical Neutral Detector (SND) [1] is intended for study of electron-positron annihilation at the VEPP-2000 e+e- collider (BINP, Novosibirsk) [2]. The main part of the SND detector is a three-layer electromagnetic calorimeter (EMC). The EMC consists of 1640 counters. Each counter includes a NaI(Tl) crystal, a vacuum phototriode [3], and a charge-sensitive preamplifier.
Currently...
Mr
Georgii Razuvaev
(BINP)
22/08/2016, 18:20
Detector design and technologies
CMD-3 is a general purpose detector designed to study e+e− annihilation into hadrons. It is mounted at the VEPP-2000 collider which operates in the wide energy range, Ec.m.s=0.32−2GeV. The calorimetry at the detector is based on three subsystems: closest to the beam pipe barrel Liquid Xenon calorimeter, outer barrel calorimeter based on CsI scintillation crystals and the endcap calorimeter...
Vyacheslav Ivanov
(BINP)
22/08/2016, 18:40
Detector design and technologies
ABSTRACT: The barrel calorimeter of CMD-3 detector consists of two subsystems, one of them being the internal calorimeter on the base of liquid xenon. The LXe-calorimeter consists of 14 layers of cylindrical ionization chambers with anode and cathode readout and allows one to measure precisely the coordinates of the point of the conversion of photon to an electron-positron pair. Another...
Alexey Kozyrev
(BINP)
22/08/2016, 19:00
Detector design and technologies
The CMD-3 (Cryogenic Magnetic Detector) is the general purpose detector, designed for experiments at VEPP-2000. The detector includes a magnetic spectrometer, made of the drift chamber and multiwire proportional chamber, placed inside the 1.3 T magnetic field generated by thin superconducting solenoid, and an electromagnetic calorimeter, made of stacked liquid Xenon-based and CsI-based barrel...
Peter Krachkov
(BINP)
23/08/2016, 10:00
Physics and computing
Method of quasiclassical Green's functions developed recently for the Dirac equation in the external fields of various configurations has allowed one to essentially advance the theoretical description of the fundamental quantum electrodynamical processes taking place at the interaction of high-energy particles with atoms. Novel results of the calculation, exact in the parameters of the atomic...
Tatyana Kharlamova
(BINP)
23/08/2016, 10:20
Physics and computing
We report a new precise measurement of composition of electron partial width and branching fraction to hadrons G_ee*B(hadrons) for J/psi meson performed with the KEDR detector at the VEPP-4M e+e- collider. Lepton and total widths were calculated using table values of the J/psi lepton branching fractions .
Experimental methods and techniques applied during this analysis can be then directly...
Dr
Kechen Wang
(DESY)
23/08/2016, 10:40
Physics and computing
The primary goal of future e+ e- colliders could be measuring the Higgs property as precise as possible. If its deviations from SM are found, these deviations can give the hints of the BSM physics. The Higgs measurements can be used to constrain the BSM physics in two different ways: the model-independent EFT approach, and the model-dependent UV complete approach. In this talk, I will give two...
Anastasiya Kuzmenko
(Budker Institute of Nuclear Physics)
23/08/2016, 11:00
Physics and computing
The interest in the decay omega -> pi0 e+ e- is related to the transition formfactors of the omega meson that can be measured in this decay. The precise value of the decay branching ratio can be useful for interpretation of experiments on quark-gluon plasma. The conversion decay omega into pi0 e+ e- has been studied at the energy range 720 — 840 MeV at the center of mass using about 10 1/pb of...
Mr
Artem Ryzhenenkov
(Budker Institute of Nuclear Physics)
23/08/2016, 11:20
Physics and computing
Since December 2010 the CMD-3 detector has taken data at the electron-positron collider VEPP-2000. The collected data sample corresponds to an integrated luminosity of 60 1/pb in the c.m. energy range from 0.32 up to 2 GeV. Preise luminosity measurement is a key issue for many experiments whih study the hadronic cross sections at e+e− colliders. The integrated luminosity of the collider was...
Daniil Voroshilov
(BINP)
23/08/2016, 11:40
Accelerator design and technologies
We propose a new diagnostic tool to study transverse beam distribution in accelerator especially the regions with low particle population (beam halo, non-gaussian tails, etc.). The monitor key element is a silica fiber which scans the beam transversely. Beam particles hit the fiber and produce Cherenkov radiation which propagates along the fiber, moves out of the vacuum chamber through the...
Mr
Valentin Volkl
(University Innsbruck)
23/08/2016, 14:00
Physics and computing
Computing plays an increasingly central role in modern HEP-experiments. Current reconstruction software solutions in particular will not scale to the demanding environment of future high-luminosity colliders and threaten to limit physics performance. This talk outlines the efforts to address this issue in the common software framework FCCSW of the Future Circular Collider design studies. ...
Rosa Simoniello
(CERN)
23/08/2016, 14:20
Physics and computing
Software represents an essential aspect in the lifecycle of every experiment. Flexibility, shareability and an efficient use of resources are very important requirements to be addressed. In this talk, a general overview of the CLIC software chain is presented, including common developments with other linear collider experiments. A comprehensive introduction to the DD4hep tool-kit, a consistent...
Mr
Jan Ebbing
(CERN)
23/08/2016, 14:40
Physics and computing
Detector optimisation studies for future high energy physics experiments require
the simulation and reconstruction of many physic processes and detector
geometries. As an efficient way of accessing the necessary computational and
storage resources, DIRAC has been developed and extended by iLCDirac, which is
specialized for the applications used in the context of linear collider...
Mr
Ivan Nikolaev
(Budker Institute of Nuclear Physics)
23/08/2016, 15:20
Accelerator design and technologies
High precision measurement in high energy physics requires accurate knowledge of initial state of colliding particles. In particular, precise measurement of the mass of elementary particles requires precision measurement of the beam energy. For example, beam energy calibration system allow one to perform new measurement of tau lepton or psi meson masses at Super c-tau Factory.
The most...
Mr
Viacheslav Kaminskiy
(Budker Institute of Nuclear Physics, Novosibirsk, Russia)
23/08/2016, 15:40
Accelerator design and technologies
The report describes a method for a fast and precise beam energy measurement in the beam energy range 0.5-2 GeV and its application at various e+e- colliders. Low-energy laser photons interact head-on with the electron or positron beam and produce Compton backscattered photons whose energy is precisely measured by HPGe detector. The method allows measuring the beam energy with relative...
Ms
Iaroslava Profatilova
(CERN/Institute of Aplied Physics NASU)
23/08/2016, 16:00
Accelerator design and technologies
The Compact Linear Collider (CLIC) is one of the candidates for next generation high energy linear colliders. In order to reach up to 3 TeV and maintain an acceptable length, the accelerating gradient must be above 100 MV/m. This results in surface electric fields of more than 200 MV/m on the copper surface of the structure. With such fields vacuum breakdowns with some probability occur and...
Mr
Renjun YANG
(LAL)
23/08/2016, 16:20
Accelerator design and technologies
Beam halo in e+e- colliders can induce significant beam loss and serious backgrounds for the experimentation, thereby significantly limiting performances. Understanding the formation mechanisms and behavior of halo particles and how to suppress them requires both modeling and measuring the tails of the beam distribution near the Interaction Point (IP). Here, we present modeling and...
Aleksey Kasaev
(Budker Institute of Nuclear Physics)
24/08/2016, 10:00
Accelerator design and technologies
The injection of the charge beams into storage ring is a task for choosing scheme which allows to make injection of the beam to the storage ring without kick out of the accumulated beam. This can be done using the fast kicker system. Kicker system consists of the fast kicker magnets, high-voltage pulse generators, transmission lines and matching loads. High peak power and pulse energy is a...
Andrey Denisov
(Budker Institute of Nuclear Physics)
24/08/2016, 10:20
Accelerator design and technologies
BINP has developed an electron cooler to increase the ion accumulation efficiency in the NICA heavy ion collider booster (JINR, Dubna). Adjustment of the cooler magnetic system provides highly homogeneous magnetic field in the cooling section B trans/B long ≤ 4∙10 -5 which is vital for efficient electron cooling. First experiments performed at BINP demonstrated the target current of 200 mA for...
Sarah Aull
(CERN)
24/08/2016, 10:40
Accelerator design and technologies
Synchrotron radiation losses are one of the main limitations for circular e+e- accelerators and require hence a large radio-frequency (RF) power system. For continuous wave (cw) operation the use of superconducting RF cavities comes with significant savings in power consumption despite the costs of cryogenics. Furthermore, the niobium thin film technology which has been developed at CERN and...
Mr
Tianjian Bian
(Institute of High Energy Physics (IHEP))
24/08/2016, 11:00
Accelerator design and technologies
CEPC is next generation circular collider proposed by China. The design of the full energy booster ring of the CEPC is especially challenging. The ejected beam energy is 120GeV but the injected beam only 6GeV. In a conventional approach, the low magnetic field of the main dipole magnets creates problems. We propose to operate the booster ring as a large wiggler at low beam energies and as a...
Viktor Dorokhov
(Budker Institute of Nuclear Physics (BINP))
24/08/2016, 11:20
Accelerator design and technologies
Synchrotron radiation is widely used at BINP colliders for e+e- beams parameters measurement. Progress and results of optical diagnostic tooling are discussed including new-generation dissector with picosecond resolution.
Mr
Danila Nikiforov
(BINP)
24/08/2016, 11:40
Accelerator design and technologies
The aim of this report is to give general information about the device which is called Electron Beam Probe (EBP). In this study low energy electron beam is used as a tool for non-destructive length measurement of high-energy sub-picoseconds electron bunches in circular machines.
Mr
Dmitry Shemyakin
(Budker Institute of Nuclear Physics)
24/08/2016, 15:00
Detector design and technologies
The detector tracking system consists of the cylindrical drift chamber (DC) and double-layer cylindrical multi-wire proportional Z-chamber, both used for a trigger, and both are installed inside thin (0.2 X_{0}) superconducting solenoid with 1.3T field.
DC contains 1218 hexagonal cells and allows to measure track parameters with high accuracy (a momentum resolution - 1.5-4.5% for 200-1000...
Magdalena Munker
(CERN / University of Bonn)
24/08/2016, 15:20
Detector design and technologies
The requirements for high precision measurements at the CLIC e+e− collider impose tight performance criteria on the vertex detector and tracking system. A single point resolution of 3μm in the vertex and 7μm in the tracker needs to be achieved. Moreover, the vertex and tracker have to be ultra-low mass detectors with a material budget of ∼0.2% X0 per layer in the vertex and ∼1% X0 per layer in...
Mr
Timofei Maltsev
(Budker Institute of Nuclear Physics)
24/08/2016, 15:40
Detector design and technologies
Micro-pattern gaseous detectors, on the one hand, possess a high spatial resolution in tens micron scale together with high rate capability and, on the other hand, they have all advantages of gaseous detectors, such as relatively low cost per unit area, possibility of large area coverage as well as a uniform and cheap gas converter. These detectors are considered as possible candidates for a...
Dr
Alexander Barnyakov
(BINP)
24/08/2016, 16:00
Detector design and technologies
FARICH (Focusing Aerogel RICH) technique based on non-homogenious 'focusing' aerogel radiator has been being developed in BINP since 2004. It is proposed for implementation in the PID system of the detector of the Super Charm-Tau factory in Novosibirsk. It should cover near 4pi solid angle and separate muons and pions with momentum from 500 to 1500 MeV/c. Idea of the FARICH method is...
Mr
Ivan Ovtin
(Budker Institute of Nuclear Physics)
24/08/2016, 16:20
Detector design and technologies
Particle identification system of the KEDR detector based on aerogel threshold Cherenkov counters ASHIPH (Aerogel SHifter PHotomultiplier). In 2014 the fully installed ASHIPH system began its operation in the KEDR experiment at the VEPP-4 M e+e--collider. The system contains 1000 liters of aerogel with the refractive index n=1.05. 160 counters are arranged in two layers and cover 96% of total...
Ivan Morozov
(Budker INP)
24/08/2016, 17:00
Accelerator design and technologies
We apply two analytical methods to control accelerator dynamic aperture with multipole potentials. Both methods assume that accelerator model is represented as a product of unperturbed and perturbed exponential operators with exponent of perturbed operator given as formal power series in perturbation parameter. Normal form method can be applied to the above representation and then the lattice...
Mr
Feng Su
(Institute of High Energy Physics(IHEP),CAS)
24/08/2016, 17:20
Accelerator design and technologies
In this paper, we introduced the layout and lattice design of Circular-Electron-Positron-Collider (CEPC) partial double ring (PDR) scheme. The baseline design of CEPC is a single beam-pipe electron positron collider, which has to adopt pretzel orbit scheme. And it is not suitable to serve as a high luminosity Z factory. If we choose partial double ring scheme, we can get a higher luminosity...
Mr
Vaagn Gambaryan
(Budker Institute of Nuclear Physics)
24/08/2016, 17:40
Accelerator design and technologies
Pulsed deflecting magnet is under development at BINP with the following parameters: the field strength is 1 mT*m in the 5 cm aperture, rise/fall time is <15 ns, and the pulse duration is about 200 ns. In our design the wire electrodes are used instead of conventional plate electrodes. A low magnet inductance provides short the rise/fall time. The report describes the magnet development,...
Ms
Kseniia Kariukina
(BINP)
24/08/2016, 18:00
Accelerator design and technologies
Sextupoles compensate the linear chromaticity in storage ring and limit a dynamic aperture by moving betatron tunes for particle with non-zero amplitude toward resonance. We consider possibility of nonlinear defining correction and
dynamic aperture increase by octupoles.
Mr
Sergey Glukhov
(BINP)
24/08/2016, 18:20
Accelerator design and technologies
In extremely high energy circular lepton collider correct consideration of synchrotron radiation is important for beam dynamics simulation. We developed fast, precise and effective method to track the particles in realistic lattice when the radiation effects are distributed along the orbit. As an example we study beam dynamics in the FCC-ee lepton collider.
Grigory Baranov
(Budker Institute of Nuclear Physics,Novosibirsk State Technical University)
24/08/2016, 18:40
Accelerator design and technologies
Bending magnet with transverse and longitudinal gradient of magnetic field allows reduction of the beam emittance against the uniform field dipole. We study effect of the field variation in bending magnet on minimum emittance in electron storage ring. We compare theoretical results with computer simulation.
Mr
Alexander Senchenko
(BINP)
24/08/2016, 19:00
Accelerator design and technologies
VEPP-2000 was commissioned and spent three successful runs 2010-2013. During operation experience of maintenance and continuous updates was acquired. Strong cooperation between accelerator complex operators and control system developers helps to provide necessary changes in short time.
