Conveners
Accelerators: Physics, Performance, and R&D for Future Facilities: Accelerator Physics/Technology
- Manqi Ruan (Chinese Academy of Sciences (CN))
Accelerators: Physics, Performance, and R&D for Future Facilities: Facilities
- Daniel Schulte (CERN)
Accelerators: Physics, Performance, and R&D for Future Facilities: Accelerator Physics/Technology
- Manqi Ruan (Chinese Academy of Sciences (CN))
Accelerators: Physics, Performance, and R&D for Future Facilities: Accelerator Facilities
- Daniel Schulte (CERN)
Accelerators: Physics, Performance, and R&D for Future Facilities: Hadron and Hadron Lepton Colliders
- Dmitri Denisov (Fermi National Accelerator Lab. (US))
Accelerators: Physics, Performance, and R&D for Future Facilities: Lepton Colliders
- Dmitri Denisov (Fermi National Accelerator Lab. (US))
Accelerators: Physics, Performance, and R&D for Future Facilities: Lepton Colliders
- Dmitri Denisov (Fermi National Accelerator Lab. (US))
The Muon Ionization Cooling Experiment (MICE) at RAL has studied the ionization cooling of muons. Several million individual particle tracks have been recorded passing through a series of focusing magnets in a number of different configurations and a liquid hydrogen or lithium hydride absorber.
Measurement of the tracks upstream and downstream of the absorber has shown the expected effects of...
Multiple Coulomb scattering and energy loss are well known phenomena experienced by charged particles as they traverse a material. However, from recent measurements by the MuScat collaboration, it is known that the available simulation codes (GEANT4, for example) overestimate the scattering of muons in low Z materials. This is of particular interest to the Muon Ionization Cooling Experiment...
The configurations of the CEPC and the SPPC were proposed in September, 2012. To reduce the costs of the construction and the operation, high efficiency klystrons is preferred for the Collider ring. In this scenario, the plan to develop the high efficiency 650MHz/800kW CW klystron with an ultimate goal of 80% is initialized. Since there are no any experiences and infrastructures such as the...
We report progress on stabilising relativistic electron beams, in terms of their position and arrival time, for achieving high luminosity at future lepton colliders such as the International Linear Collider (ILC) and the Compact Linear Collider (CLIC). Hardware has been developed and deployed at the Accelerator Test Facility (ATF) at KEK for measuring and stabilising the beam position at the...
SuperKEKB is 7GeV electron and 4GeV positron double-ring collider for the B-meson factory, whose design luminosity is $8 \times 10^{35} \mbox{cm}^{-2}/\mbox{sec}$. We have already completed the phase-1 commissioning without the interaction point from February 2 to June 28, 2016. The phase-2 commissioning with the interaction point is planed to start from March 19, 2018. We report the...
The J-PARC E34 experiment aims to measure muon g-2 with a precision of 0.1 ppm and search for EDM with a sensitivity to 10-21 e*cm with a low emittance muon beam. The low emittance muon beam is generated from surface muon beam after thermal muonium production, dissociation of electron by laser, and acceleration by a radio-frequency (RF) linac. One of challenges for the E34 experiment is muon...
We present status of operation and recent progress of the Fermilab proton accelerators, and discuss in our activities toward their near- and far-future upgrades. We also present the spectrum of related accelerator physics and technology R&D activities, including those at the US-leading FAST/IOTA research facility for the intensity frontier beam studies.
The Long Baseline Neutrino Facility (LBNF) will utilize a beamline located at Fermilab to provide and aim a neutrino beam of sufficient intensity and appropriate energy range toward DUNE detectors, placed deep underground at the Sanford Underground Research Facility (SURF) in South Dakota. LBNF is designed for approximately twenty years of operation, to provide adequate exposure for the DUNE...
Previous Muon g-2 experiment at BNL measured the anomalous magnetic moment of muon which is $\approx 3 \sigma$ away from the Standard Model value. The Fermilab Muon g-2 Collaboration started commissioning runs with an upgraded version of the storage ring. In the first phase, the new experiment aims 4 times more sensitivity thanks to several improvements including muons statistics, pileup...
Modern accelerators for High Energy Physics (ILC, FCC-ee, FCC-he, CEPC) demand efficient operation of SRF cavities. Since low cryogenic losses and high quench fields are essential to save in both capital and operational cost, basic SRF R&D on niobium cavities is focused on increasing the quality factor at the highest accelerating gradient.
The talk will be focused on the description of the...
The pEDM experiment aims to search for the electric dipole moment (EDM) of proton with $10^{-29}$ e-cm sensitivity, approximately 5 orders of magnitude better than the current experimental limit. The experiment is designed to store counter-rotating proton beams in an all-electric storage ring. The EDM of the particles will couple with the radial electric field, causing a spin growth around the...
The LUCID detector is the main luminosity provider of the ATLAS experiment and the only one able to provide a reliable luminosity determination in all beam configurations, luminosity ranges and at bunch-crossing level.
LUCID was entirely redesigned in preparation for Run 2: both the detector and the electronics were upgraded in order to cope with the challenging conditions expected at the LHC...
To guarantee smooth and uninterrupted luminosity measurements the CMS experiment is equipped in Run II with three online luminometers: the Pixel Luminosity Telescope (PLT), the Fast Beam Condition Monitor (BCM1F) and the Forward Calorimeter (HF). For the offline luminosity measurement and a cross check of the online detectors the pixel detector is used (Pixel Cluster Counting, PCC). For the...
The electric dipole moment (EDM) of fundamental particles, when induced by the particle internal spin, violates separately the parity (P) and time (T) reversal symmetries. Due to CPT conservation, T-violation also means CP-violation and it is a sensitive probe of Physics beyond the standard model (SM).
The storage ring EDM (srEDM) collaboration and the Juelich electric dipole investigations...
AWAKE is a plasma wakefield acceleration experiment at CERN, using the $400~\mathrm{GeV}$ proton bunch of the SPS to drive an accelerating gradient in the GV m$^{-1}$ range. AWAKE aims to inject 15–20 MeV electrons into this plasma wakefield and accelerate them to GeV energies over 10 metres. An introduction to AWAKE and its physics will be presented, as well as an overview of the experimental...
A Crab-Waist e+e- collider with the beam energy from 1 GeV to 3 GeV is under development at Budker INP (Novosibirsk, Russia) to study physics in charmonium and tau-lepton sectors. The talk reviews realisation principles, configuration and features of the collider including extremely high luminosity of 10^35 cm^-2s^-1 and longitudinal polarization of electron beam.
CERN has launched in 2014 the design study of Future Circular Colliders, including a High Luminosity e+e- collider (FCC-ee) running from the Z pole to above the top pair production threshold. Follow a 100 TeV pp and heavy ion collider (FCC-hh) able to reach an unprecedented energy scale and possibly an e-p collider. The FCC-ee offers a broad discovery potential based on a combination of...
The feasibility of a future proton-proton collider (FCC-hh), with center of mass energies up to 100 TeV and unprecedented luminosity is currently being studied.
By delivering an integrated luminosity of few tens of ab-1, such a machine will provide an outstanding discovery potential for new physics, far beyond the reach the high luminosity or high energy LHC. In this talk we will discuss...
The Future Circular Collider (FCC) Study aims at developing a large-scale accelerator research infrastructure based on a 100 km tunnel. While the ultimate goal is a proton-proton collider, with 100 TeV centre-of-mass collision energy and unprecedented direct discovery potential. Also ion-ion and ion-proton collisions are possible. The initial project stage could consist of an electron-positron...
Fermilab in collaboration with other members of the US Magnet Development Program (MDP) is working on the development of accelerator magnets for future hadron colliders. A 4-layer, 15-T dipole with 60 mm bore based on Nb3Sn superconductor is under construction with the testing foreseen at the end of the year. At the same time, there are conceptual design studies to evaluate the feasibility of...
R&D of high field HTS magnet technology is ongoing at IHEP (Beijing, China) for future high energy accelerators. A hybrid twin-aperture dipole magnet is under development for SPPC pre-study. The magnet is designed with Common-coil configuration and will be fabricated with Nb3Sn and HTS superconductors. The main field is 12 T with 20% operating margin at 4.2 K. The aperture diameter is 30 mm....
Energy-frontier DIS can be realised at CERN through an energy recovery linac that would produce 60 GeV electrons to collide with the HL-LHC or later HE-LHC (LHeC) or eventually the FCC hadron beams (FCC-eh). This would create a new laboratory for energy frontier particle and nuclear physics. It provided electron-proton/nucleus collisions with centre-of-mass energies in the range 0.3-3.5 TeV...
The Future Circular Collider (FCC) Study aims at developing a large-scale accelerator research infrastructure based on a 100 km tunnel. While the ultimate goal is a proton-proton collider, with 100 TeV centre-of-mass collision energy and unprecedented direct discovery potential, the initial project stage could consist of an electron-positron collider, with highest luminosities at collision...
In this talk, CEPC CDR status will be reported which relects the CEPC accelerator baeline design status with Higgs, W, and Z operation modes, which includes parameters, collider ring, booster and injection linac designs, including SCRF system, civil engeneering design, cost breakdown and Ac power consumption analysis.
As for CEPC TDR phase, the key R&D issues are addressed with CEPC project timeline.
CEPC is a 100 km circular electron-positron collider operating at 90-240 GeV center-of-mass energy of Z-pole, WW pair production threshold and Higgs resonance. CEPC and its successor SPPC, a 100 TeV center-of-mass super proton-proton collider, will ensure the elementary particle physics a vibrant field for decades to come. To reduce the overall cost, partial double ring scheme was proposed as...
Circular Electron-Positron Collider (CEPC) is a 100 km ring e+ e- collider for a Higgs factory. The injector of CEPC is composed of linac and booster. The linac is a normal conducting S-band linac and provide electron and positron beam at an energy up to 10 GeV with repetition frequency in 100 Hz. The linac consideration and design will be detailed discussed, including electron linac, positron...
Machine-Detector Interface (MDI) represents one of the most challenging topics for the Circular Electron Positron Collider (CEPC), which is proposed as a Higgs Factory to measure Higgs properties with unprecedented precision. MDI involves critical machine and detector components in the constrained interaction region. Performance optimization, often along with considerable trade-offs, can be...
Key technologies for the ILC are nano-beam and superconducing rf system (SRF). The final beam size at 250GeV ILC, which was announced at ICFA on last November, is ~8nm. In case of 250 GeV ILC, the number of SRF cavities becomes half (compared with 500 GeV). However, the cost of the SRF is still dominant in the ILC accelerator cost. We have started the cost reduction R&D at SRF since last year....
The Compact Linear Collider (CLIC) collaboration will present a project implementation plan for construction of a 380 GeV e+e- linear collider for the European Strategy update by the end of 2018. The machine is upgradable in stages to 3 TeV. The CLIC concept is based on high-gradient normal-conducting accelerating structures operating at X-band (12 GHz) frequency.
We present the CLIC...
CERN today operates a small ~200 MeV electron test-facility for accelerator R&D (CLEAR). This facility was put into operation in 2017 and a number of R&D activities were started. The results for accelerator R&D at the CLEAR facility will be reviewed including the plans for 2018-20.
Longer term and in the framework of the Beyond Collider Physics studies at CERN at 3.5 GeV electron linac is...
To discover and study a mu+mu- atom (dimuonium) we propose a low energy (410 MeV per beam) e+e- collider with extremely large crossing angle to boost the dimuonium atoms from the collision area and reduce a background. A report describes the collider status and its parameters.
