Return yoke

Fig. 8.3 Main process steps of CF-SPT head fabrication (a) bottom return yoke, (b) bottom coU, (c) main pole, (d) top coil, (e) top return yoke, and (f) ABS...

Return yoke Main yoke Return yoke Coil Coil... 

Ise K, Yamakawa K, Honda N (2003) High-field gradient cnsp field single-pole writing head with front return yoke. IEEE Trans Magn 39 2374-2376... 

The CMS experiment—one of the four large LHC experiments— is a general-purpose detector designed to optimally exploit the physics potential of the LHC. Located inside the superconducting solenoid, which provides a 3.8 Tesla held, are the hadronic and electromagnetic calorimeters as well as the tracking system. The latter is based on silicon pixels and silicon strip detectors, with a total sUicon area of 210 m. A multi-layer muon system embedded in the return yoke outside the solenoid completes the CMS detector. 

The muon system is the outermost part of the CMS detector. The magnet return yoke is equipped with gaseous detector chambers for muon identification and momentum measurement. In the barrel, the muon stations are arranged in five separate iron wheels... 

Figure IX.G.2 shows the results of calculations performed with the /o-dimensional field simulation package POISSON. Since these 2-D calculations cannot accurately simulate the path of the return flux in the clamps or the magnet yoke, the results were combined with calculations done by hand and by the three-dimensional magnet simulation program TOSCA to determine field clamp thickness requirements.

On the exit side of the 48D48, a split field clamp design in which the flux returns back to the yoke will be used. This design leaves a large open region above and below the beam line which allows room for the deflected K beam to exit near the bottom of the magnet gap, and has minimal interference with the back drift chambers near the top of the magnet gap. 

Perhaps the most common technique in use is the C-scan, shown in Fig. 3.10. Coupling is achieved by totally immersing the structure in water. The pulse is reflected by a smooth surface so as to return to the probe (used in the send/receive mode). Sometimes a second (receiver) probe is used instead of the reflector, the two probes being linked by a yoke. This is often necessary with honeycomb structures since the returning signal is very weak. The probe is traversed automatically over the structure and the amplitude of the signal associated with transmission through the structure is indicated on an X-Y or similar recorder. The X and Y coordinates correspond to the position on the surface, while some other parameter is used to indicate quality. One... 

---