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CEA Contribution to the PIP-II Linear Accelerator
The Proton Improvement Plan II (PIP-II) that will be installed at Fermilab is the first U.S. accelerator project that will have significant contributions from international partners. CEA joined the international collaboration in 2018, and will deliver 10 low-beta cryomodules as In-Kind Contribution to the PIP-II project, with cavities supplied by LASA-INFN and power couplers and tuning systems supplied by Fermilab. This paper presents the CEA scope of work that includes the design, manufacturing, assembly and tests of the cryomodules and the upgrade of the existing infrastructures to the PIP-II requirements.
Compact, High-Power Superconducting Electron Linear Accelerators for MW Industrial Applications
Fermilab has developed a novel concept for an industrial electron linac using Nb₃Sn coating technology and conduction cooling. We will show the range of multi-cavity linac designs targeted toward various applications. We will also discuss technology development status with results on conduction cooling of SRF cavities based on cryocoolers, which removes the need for liquid Helium, thus making SRF technology accessible to industrial applications. These conduction-cooled linacs can generate electron beam energies up to 10 MeV in continuous-wave operation and can reach higher power (>=1 MW) by combing several modules. Compact and light enough to mount on mobile platforms, our machine is anticipated to enable new in-situ environmental remediation applications such as waste-water treatment for urban areas, X-ray medical device sterilization, and innovative pavement applications. We also show cost-economics and key R&D areas that much be addressed for a practical machine.
Final Design of the LB650 Cryomodule for the PIP-II Linear Accelerator
The Proton Improvement Plan II (PIP-II) that will be installed at Fermilab is the first U.S. accelerator project that will have significant contributions from international partners. CEA joined the international collaboration in 2018, and its scope covers the supply of the 650 MHz low-beta cryomodule section, with the design of the cryostat (i.e the cryomodule without the cavities, the power couplers and the frequency tuning systems) and the manufacturing of its components, the assembly and tests of the pre-production cryomodule and 9 production modules. An important milestone was reached in April 2023 with the Final Design Review. This paper presents the detailed design of the 650 MHz low-beta cryomodules.
High power superconducting electron linear accelerators for industrial applications: Technology development and experimental results at Fermilab
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Compact, High-Power Superconducting Electron Linear Accelerators for MW Industrial Applications [Slides]
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Compact, high-power superconducting electron linear accelerators for environmental and industrial applications: projects and status
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Randomized algorithms for accelerating linear algebraic computations
The project supported the development of new methodologies for performing matrix computations that form key building blocks in modern scientific computing, such as low rank approximation of matrices, and efficient representations of global operators that arise in simulations of physical phenomena.
Effect of changing resultant linear acceleration relative to the subject on nystagmus generated by angular acceleration.
Centripetal acceleration effect on nystagmus for various orientations relative to rotation center, noting otolith modulation of sensory input from semicircular canals
Effect of changing resultant linear acceleration relative to the subject on nystagmus generated by angular acceleration.
Additional effect of centripetal acceleration on nystagmus in humans already exposed to angular acceleration
Nonlinear structural vibrations by the linear acceleration method
Numerical integration method for calculating dynamic response of nonlinear elastic structures
Off-vertical rotation - A convenient precise means of exposing the passive human subject to a rotating linear acceleration vector
Disturbances of vestibular origin comprising motion sickness resulting from rotating tilted chair
Linear accelerator: A concept
Design is proposed for inexpensive accelerometer which would work by applying pressure to fluid during acceleration. Pressure is used to move shuttle, and shuttle movement is sensed and calibrated to give acceleration readings.
Sustained linear acceleration
The subjective effects of sustained acceleration are discussed, including positive, negative, forward, backward, and lateral acceleration effects. Physiological effects, such as retinal and visual response, unconsciousness and cerebral function, pulmonary response, and renal output, are studied. Human tolerance and performance under sustained acceleration are ascertained.
Human eye movements during various forms of linear acceleration and weightlessness
Eye movements of human subjects were recorded electronystagmographically in complete darkness during rectilinear horizontal accelerations as achieved in cars on the ground and also during aircraft parabolic flight. The results were compared to the movements of blinded goldfish subjected to similar changes of gravitoinertial forces. The results indicate that there is a human correlation with the gravity reference response of fish. During horizontal forward accelerations on the ground the human eyes turn downward and during horizontal backward acceleration the eyes turn upward. The human eye response to g-loads below 1 g and to weightlessness is the reverse of the tilt of the fish. While fish dive down during low g, or loop forward during weightlessness, the eyes of subjects sitting upright in an aircraft which flies at 0 g move upward.
Quantification of different classes of canal-related vestibular nuclei neuron responses to linear acceleration
No abstract available
Radiation spectrometer for RF breakdown detection in THz linear accelerators DOE FY 2018 (Release 2) Phase IIA SBIR/STTR (Final Report)
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