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- | **The S800 spectrograph** | + | ====== Technical Aspects of the S800 ====== |
+ | |||
+ | ===== Technical Introduction ===== | ||
+ | |||
+ | ==== General ==== | ||
+ | The S800 [1] is a superconducting | ||
+ | |||
+ | {{: | ||
+ | |||
+ | ==== Analysis Line ==== | ||
+ | The analysis line extends from the object position to the target station, with a total length of 22 m. It includes four 22.5° dipoles, five quadrupole triplets, and two vertically steering magnets, assembled in two segments with configurations QQQ-H-DD-QQQ (segment 6) and QQQ-DD-H-QQQ-QQQ (segment 7) symmetrically oriented around an intermediate image plane. The maximum rigidity is 5 Tm, although it depends on the tune of the quadrupoles. The acceptances of the analysis line depends on the optical mode. | ||
+ | |||
+ | |||
+ | ==== Spectrograph ==== | ||
+ | The spectrograph consist of two quadrupoles, | ||
+ | |||
+ | |||
+ | |||
+ | ^ Momentum Resolution (p/ | ||
+ | ^ Momentum Acceptance | ||
+ | ^ Angle Resolution | ||
+ | ^ Solid Angle Acceptance | ||
+ | ^ Momentum Dispersion (x/ | ||
+ | ^ Angle Dispersion (y/b) | 0.9 mm/ | ||
+ | ^ Magnification(x/ | ||
+ | ^ Focal Plane Size (x × y) | 55 cm ×15 cm | | ||
+ | ^ Maximum Rigidity | ||
+ | ^ Detector Position Resolution (x)| 0.3 mm | | ||
+ | ^ Detector Position Resolution (y)| 0.3 mm | | ||
+ | |||
+ | |||
+ | |||
+ | ====== Headline ====== | ||
+ | ====== Headline ====== | ||
+ | |||
+ | ====== Headline ====== | ||
+ | ====== Level 1 Headline ====== | ||
+ | ===== Level 2 Headline ===== | ||
+ | ==== Level 3 Headline ==== | ||
+ | === Level 4 Headline === | ||
+ | == Level 5 Headline == | ||
+ | |||
+ | ---- | ||
+ | ∑ | ||
+ | * Unordered List Item | ||
+ | * * Unordered List Item | ||
+ | * * Unordered List Item | ||
+ | * | ||
+ | * Technical Introduction | ||
- | * Technical Introduction | ||
* Ion optics | * Ion optics | ||
* Detectors | * Detectors | ||
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DETECTORS | DETECTORS | ||
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The standard detection system of the S800 includes a plastic scintillator at the object station; two tracking detector at the detector station in the Intermediate Image plane; a pair of cathode readout drift chambers (CRDC) located about 1 m apart; a multi-segmented ion chamber, and four large plastic scintillators of thicknesses 3 mm, 5 cm, 10 cm and 20 cm, respectively. | The standard detection system of the S800 includes a plastic scintillator at the object station; two tracking detector at the detector station in the Intermediate Image plane; a pair of cathode readout drift chambers (CRDC) located about 1 m apart; a multi-segmented ion chamber, and four large plastic scintillators of thicknesses 3 mm, 5 cm, 10 cm and 20 cm, respectively. | ||
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Cathode Readout Drift Chambers (CRDC) | Cathode Readout Drift Chambers (CRDC) | ||
+ | |||
Two Cathode Readout Drift Chamber (CRDC) are used to measure the transversal positions and angles in the focal plane. The first detector (CRDC1) is located at the nominal optical focal plane, and it is separated 1 m from the second downstream detector (CRDC2). | Two Cathode Readout Drift Chamber (CRDC) are used to measure the transversal positions and angles in the focal plane. The first detector (CRDC1) is located at the nominal optical focal plane, and it is separated 1 m from the second downstream detector (CRDC2). | ||
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Ionization Chamber | Ionization Chamber | ||
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An ionization chamber downstream of both CRDCs is used to identify the Z number of the transmitted nuclei from their energy loss. The detector has an active volume of xxx cm x xxx cm x xxx cm and is filled with P10 gas at a typical pressure of 300 torr, although this value can be increased up to 600 torr for light nuclei. A technical layout of the detector is shown in Fig. Table xxx lists some of the technical specifications. The detector consists of 16 stacked-parallel plate ion chambers with narrow anode-cathode gaps, placed along the detector’s central axis. Each anode is sandwiched by two cathodes foils made of aluminum evaporated mylar. | An ionization chamber downstream of both CRDCs is used to identify the Z number of the transmitted nuclei from their energy loss. The detector has an active volume of xxx cm x xxx cm x xxx cm and is filled with P10 gas at a typical pressure of 300 torr, although this value can be increased up to 600 torr for light nuclei. A technical layout of the detector is shown in Fig. Table xxx lists some of the technical specifications. The detector consists of 16 stacked-parallel plate ion chambers with narrow anode-cathode gaps, placed along the detector’s central axis. Each anode is sandwiched by two cathodes foils made of aluminum evaporated mylar. | ||
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Tracking Parallel Plate Avalanche Counters | Tracking Parallel Plate Avalanche Counters | ||
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Some experiments are particularly sensitive to the incoming positions and angles of the nuclei impinging on the target. Two tracking parallel plate avalanche counters (TPPAC) are installed in the intermediate image plane of the analysis line. The position and angles measured with both TPPACs are transformed into the corresponding coordinates in front of the target, using the transfer matrix of the second half of the analysis line. The analysis-line dipole magnets downstream of the intermediate image plane filter the particles produced | Some experiments are particularly sensitive to the incoming positions and angles of the nuclei impinging on the target. Two tracking parallel plate avalanche counters (TPPAC) are installed in the intermediate image plane of the analysis line. The position and angles measured with both TPPACs are transformed into the corresponding coordinates in front of the target, using the transfer matrix of the second half of the analysis line. The analysis-line dipole magnets downstream of the intermediate image plane filter the particles produced | ||
Each TPPAC has an active area of 10 cm × 10 cm and is filled with isobutane at a typical pressure of 5 torr. The detector consists of a cathode foil with a series of aluminum strips oriented in the non-dispersive direction, followed by an anode plate and a second cathode foil with the strips oriented in the dispersive direction (see Fig xxx). A total of 128 pads are connected to the strips of each cathode foil, with a pitch of 1.27 mm. | Each TPPAC has an active area of 10 cm × 10 cm and is filled with isobutane at a typical pressure of 5 torr. The detector consists of a cathode foil with a series of aluminum strips oriented in the non-dispersive direction, followed by an anode plate and a second cathode foil with the strips oriented in the dispersive direction (see Fig xxx). A total of 128 pads are connected to the strips of each cathode foil, with a pitch of 1.27 mm. |