نتایج جستجو برای: photoneutron pacemaker linac
تعداد نتایج: 29765 فیلتر نتایج به سال:
.In this paper, we discuss some basic beam dynamics issues related to obtaining and preserving the luminosity of a next generation linear collider. In Figure 1 you see a diagram illustrating the main subsystems of one-half of the collider. The beams are extracted from a damping ring and compressed in length by the first bunch compressor. They are then accelerated in a preaccelerator linac up to...
The main obstacle to emittance preservation in the main linac of a linear collider is the alignment of the quadrupoles and accelerating cavities with respect to the beam. The misalignment tolerances in the case of the TESLA superconducting main linac are reviewed. Simulations of possible beam-based alignment algorithms to meet these tolerances are presented. Presented at 2002 European Particle ...
The TRASCO project for nuclear waste transmutation [1] requires a 5-100 MeV linac for acceleration of a 30 mA proton beam. Generally, room temperature Drift Tube Linac structures are used in this energy range; however, since the high duty cycle required for high current beams implies a very high power density on the resonators walls, the superconducting solution would offer many advantages. Amo...
The Brookhaven Accelerator Test Facility (ATF) consists of a 50-MeV/c electron linac and a high-brightness RF-gun both operating at 2856 MHi. An extremely short (a few picoseconds) electron pulse with a low transverse emittance is generated by the RF-gun. In order to preserve both longitudinal and transverse emittances, great care must be taken in transporting the election beam from the RF-gun ...
Beam operation of the bERLinPro energy recovery linac project, whose construction is under way, will initially start using the photoinjector and booster modules. In a second step the recirculation beam line and the main Linac module will be added. Here the current design status of the main linac module is described. Results of wake field simulations are compared for different set ups. We also r...
background: megavoltage beams used in radiotherapy are contaminated with secondary electrons. different parts of linac head and air above patient act as a source of this contamination. this contamination can increase damage to skin and subcutaneous tissue during radiotherapy. monte carlo simulation is an accurate method for dose calculation in medical dosimetry and has an important role in opt...
We discuss possible acceleration scenarios and methods for a µ + − µ − collider. The accelerator must take the beams from ∼100 MeV to 2 TeV within the muon lifetime (2.2 × 10 −6 E µ /m µ µS), while compressing bunches of ∼10 12 muons from m to cm bunch lengths. Linac, recircu-lating linac, and very rapid-cycling synchrotron approaches are studied. Multiple recirculating linac approaches are mat...
Using two frequency domain and one time domain numerical approaches, we calculate the short-range longitudinal wakefield of the NLC linac accelerating structure, and find that the results agree to 5%. We show that our results are consistent with an analytical formula for the impedance at high frequencies. We, in addition, obtain through fitting a simple formula for the short-range wakefield of ...
The Linac Coherent Light Source (LCLS) is a SASE xray Free-Electron Laser (FEL) project presently under construction at SLAC [1]. The injector section, from drive-laser and RF photocathode gun through first bunch compressor chicane, was installed in fall 2006. Initial system commissioning with an electron beam has recently been completed. The second phase of construction, including second bunch...
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