This report addresses the feasibility of designing and constructing an asymmetric B-factory based... more This report addresses the feasibility of designing and constructing an asymmetric B-factory based on the PEP storage ring at SLAC that can begin operation at a luminosity of 3 X 10³³ cm²s¹ and could ultimately reach even higher luminosity. Such a facility, operating at the (4S) resonance, could be used to study mixing, rare decays, and CP violation in the
... of Wake-Field Suppression in a Detuned X-Band Accelerator Structure C. Adolphsen, K. Bane, T.... more ... of Wake-Field Suppression in a Detuned X-Band Accelerator Structure C. Adolphsen, K. Bane, T. Higo,* K. Kubo,* R. Miller, R. Ruth, K. Thompson ... To achieve this distribution, the cells vary in iris radius (5.72 to 3.90 mm), iris thickness (1 to 2 mm), and cavity radius (1 1.44 to ...
We have used relativistic klystron technology to extract 290 MW of peak power at 11.4 GHz from an... more We have used relativistic klystron technology to extract 290 MW of peak power at 11.4 GHz from an induction linac beam, and to power a short 11.4-GHz high-gradient accelerator. We have measured rf phase stability, field emission, and the momentum spectrum of an ...
The design of CLIC is based on a two-beam scheme, where short pulses of high power 30 GHz RF are ... more The design of CLIC is based on a two-beam scheme, where short pulses of high power 30 GHz RF are extracted from a drive beam running parallel to the main beam. The 3rd generation CLIC Test Facility (CTF3) will demonstrate the generation of the drive beam with the appropriate time structure, the extraction of 30 GHz RF power from this beam, as well as acceleration of a probe beam with 30 GHz RF cavities. The project makes maximum use of existing equipment and infrastructure of the LPI complex, which became available ...
The CLIC study of high-energy (0.5-5 TeV), high-luminosity (10 34-10 35 cm-2 {s}-1) e±linear coll... more The CLIC study of high-energy (0.5-5 TeV), high-luminosity (10 34-10 35 cm-2 {s}-1) e±linear collider is presented. Beam acceleration using high-frequency (30 GHz) normal-conducting structures operating at high accelerating fields (100 to 200 MV/m) significantly reduces the length and, in consequence, the cost of the linac. Based on new beam and linac parameters derived from a recently developed set of general scaling laws for linear colliders, the beam stability is shown to be similar to lower frequency designs in spite of the strong ...
A laser-driven electron-storage ring can produce nearly monochromatic, tunable X-rays in the keV ... more A laser-driven electron-storage ring can produce nearly monochromatic, tunable X-rays in the keV energy regime by inverse Compton scattering. The small footprint, relative low cost and excellent beam quality provide the prospect for valuable preclinical use in radiography and tomography. The monochromaticity of the beam prevents beam hardening effects that are a serious problem in quantitative determination of absorption coefficients. These values are important e.g. for osteoporosis risk assessment. Here, we report quantitative computed tomography (CT) measurements using a laser-driven compact electron-storage ring X-ray source. The experimental results obtained for quantitative CT measurements on mass absorption coefficients in a phantom sample are compared to results from a rotating anode X-ray tube generator at various peak voltages. The findings confirm that a laser-driven electron-storage ring X-ray source can indeed yield much higher CT image quality, particularly if quantitat...
This report addresses the feasibility of designing and constructing an asymmetric B-factory based... more This report addresses the feasibility of designing and constructing an asymmetric B-factory based on the PEP storage ring at SLAC that can begin operation at a luminosity of 3 X 10³³ cm²s¹ and could ultimately reach even higher luminosity. Such a facility, operating at the (4S) resonance, could be used to study mixing, rare decays, and CP violation in the
... of Wake-Field Suppression in a Detuned X-Band Accelerator Structure C. Adolphsen, K. Bane, T.... more ... of Wake-Field Suppression in a Detuned X-Band Accelerator Structure C. Adolphsen, K. Bane, T. Higo,* K. Kubo,* R. Miller, R. Ruth, K. Thompson ... To achieve this distribution, the cells vary in iris radius (5.72 to 3.90 mm), iris thickness (1 to 2 mm), and cavity radius (1 1.44 to ...
We have used relativistic klystron technology to extract 290 MW of peak power at 11.4 GHz from an... more We have used relativistic klystron technology to extract 290 MW of peak power at 11.4 GHz from an induction linac beam, and to power a short 11.4-GHz high-gradient accelerator. We have measured rf phase stability, field emission, and the momentum spectrum of an ...
The design of CLIC is based on a two-beam scheme, where short pulses of high power 30 GHz RF are ... more The design of CLIC is based on a two-beam scheme, where short pulses of high power 30 GHz RF are extracted from a drive beam running parallel to the main beam. The 3rd generation CLIC Test Facility (CTF3) will demonstrate the generation of the drive beam with the appropriate time structure, the extraction of 30 GHz RF power from this beam, as well as acceleration of a probe beam with 30 GHz RF cavities. The project makes maximum use of existing equipment and infrastructure of the LPI complex, which became available ...
The CLIC study of high-energy (0.5-5 TeV), high-luminosity (10 34-10 35 cm-2 {s}-1) e±linear coll... more The CLIC study of high-energy (0.5-5 TeV), high-luminosity (10 34-10 35 cm-2 {s}-1) e±linear collider is presented. Beam acceleration using high-frequency (30 GHz) normal-conducting structures operating at high accelerating fields (100 to 200 MV/m) significantly reduces the length and, in consequence, the cost of the linac. Based on new beam and linac parameters derived from a recently developed set of general scaling laws for linear colliders, the beam stability is shown to be similar to lower frequency designs in spite of the strong ...
A laser-driven electron-storage ring can produce nearly monochromatic, tunable X-rays in the keV ... more A laser-driven electron-storage ring can produce nearly monochromatic, tunable X-rays in the keV energy regime by inverse Compton scattering. The small footprint, relative low cost and excellent beam quality provide the prospect for valuable preclinical use in radiography and tomography. The monochromaticity of the beam prevents beam hardening effects that are a serious problem in quantitative determination of absorption coefficients. These values are important e.g. for osteoporosis risk assessment. Here, we report quantitative computed tomography (CT) measurements using a laser-driven compact electron-storage ring X-ray source. The experimental results obtained for quantitative CT measurements on mass absorption coefficients in a phantom sample are compared to results from a rotating anode X-ray tube generator at various peak voltages. The findings confirm that a laser-driven electron-storage ring X-ray source can indeed yield much higher CT image quality, particularly if quantitat...
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Papers by R. Ruth