Generation of multiple bipolar voltage pulses for a phase rotation LIA
In the year 2000, a design concept of a Neutrino Factory based on Muon Storage Ring was studied at FNAL. To treat high energy spread of muons that come out of a target and decay channel and are to be accelerated before they go into the storage ring, a phase rotating scheme using a long-pulse accelerating system has been proposed. In this system the accelerating voltage is to be shaped to correct the energy spread. To implement this approach, the pulse power system has been suggested that allows forming a bipolar accelerating voltage pulse with the predefined shape. This report addresses some issues of the pulse shape optimization and describes main features of the accelerating system comprising an accelerating structure similar to that of a linear induction accelerator (LIA) and a pulser that drives it.
Muon phase rotation using an induction linac
The proposed neutrino factory requires that the muons produced by the decay of pions and kaons produced by a target be phase-rotated before they can be cooled and then accelerated. This report describes a muon phase-rotation system that employs an induction acceleration system. The phase-rotation system consists of a 100-meter long induction accelerator, a mini-cooling system with magnetic flux reversal, and two 80-meter long induction linacs with a drift space between them. The induction linac phase-rotation system uses a 620-mm warm bore 1.25 T superconducting solenoid to guide the muons in the beam channel. The phase-rotation linac is divided into 1-meter long components each with its superconducting solenoid. This report describes the induction cells, the induction cell power system, and the superconducting solenoid contained within those cells.
Shoeless Joe: Fantasy and the Humor of Fellow-Feeling
In his essay on Jean Paul Friedrich Richter, Thomas Carlyle writes of a humor that manifests itself in smile rather than laughter. "Richter is a man of mirth," says Carlyle, whose humor is "capricious . . . quaint . . . [and] heartfelt" (15). The three adjectives represent for Carlyle the essence of what he terms "true humor" because they suggest Richter's enormous respect for humanity. "True humor," he goes on to say, "springs not more from the head than from the heart; it is not contempt, its essence is love; it issues not in laughter, but in still smiles, which lie far deeper" (17). These smiles are not Hobbesian smirks of superiority1 but genuine signs of compassion for, sympathy toward, and empathy with the object of the humor. Carlyle further provides a direct link between humor and both pathos and nobility; the link is the smile of the caring man. For Carlyle, this smile is one of "fellow-feeling":