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questions_area [2018/09/10 14:04] schatz |
questions_area [2018/09/24 12:51] berg |
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- | Some questions from Lecture 1 (Berg): | + | ==== Some questions from Lecture 1 (Berg):==== |
* Why are the dots on the " | * Why are the dots on the " | ||
* What is the real world example of measuring emittance? | * What is the real world example of measuring emittance? | ||
Line 10: | Line 11: | ||
* How do we define the central ray? | * How do we define the central ray? | ||
* R11, R12, R21, R22 - can more than one be zero? | * R11, R12, R21, R22 - can more than one be zero? | ||
+ | {{: | ||
+ | |||
+ | ==== Some questions from Lecture 2 (Couder): | ||
+ | * Does the kinematics calculator include anisotropic gamma radiation? | ||
+ | * Why is the angular acceptance fixed? | ||
+ | * Beam spot and divergence in front of target, focusing necessary to minimize (x|a)? | ||
+ | * If (x|a) is non zero, how does that affect the resolving power? | ||
+ | * Rejection requirements were unclear | ||
+ | * Is x_0 the half beam spot size? | ||
+ | * definition of rejection for detectors | ||
+ | * What is the meaning of the interpolation line of the charge state distribution? | ||
+ | * Are separators ever compromised by space charge effects from large beam currents? | ||
+ | * What limits the systematic errors in measurement efficiency, transmission, | ||
+ | * How significant can be the background in a (p,g) experiment from target impurities? | ||
+ | * Notation: is there a difference between (x|d)d_1, (x,m)dM/M, and (x|\Delta M) \Delta M/ | ||
+ | |||
+ | ==== Some questions from Lecture 3 (Berg):==== | ||
+ | |||
+ | * 1) Does COSY allow implementation of higher order corrections in dipoles? | ||
+ | * 2) Why dipoles doublets instead of one large dipole? | ||
+ | * 3) Definition of K, T, and C in dispersion matching. | ||
+ | * 4) Define fringe field. | ||
+ | * 5) Define Rogowski profile. | ||
+ | * 6) Explain H and K coil in K600 Spectrometer. Why quad inside K600? | ||
+ | * 7) HO in K600 Spectrometer. | ||
+ | * 8) How to use reconstruct the scattering angle at target from focal plane measurement? | ||
+ | * 9) Discuss only one spectrometer (e.g. K600, Grand Raiden, Big Karl). | ||
+ | * 10) Explain magnetization of ferro-magnetic material. | ||
+ | * 11) p. 14 Why not 0 deg with beam (for dispersion matching)? | ||
+ | * 12) Will permanent magnet saturate material. Similar to coil generated fields? | ||
+ | * 13) Why is dispersion matching needed? | ||
+ | * 14) Can EFL be measured? | ||
+ | |||
+ | {{ : | ||
+ | |||
+ | ==== Some questions from Lecture 4 (Berg):==== | ||
+ | |||
+ | * 1) How does COSY calculated the fringe field? | ||
+ | * 2) How important are accurate fringe field measurements for SECAR and St. GEORGE? | ||
+ | * 3) What is the meaning of the rectangles in COSY graphics output? | ||
+ | * 4) In an achromatic fragment separator, do you need a slit and/or a wedge in the dispersive intermediate plane. | ||
+ | * 5) In a gas filled separator are all charge states collected in one location? | ||
+ | * 6) How does a wedge restore the achromaticity in a fragment separator? | ||
+ | * 7) What is the purpose of the DSR (Spin dipole) in front of GRAND RAIDEN focal plan? | ||
+ | {{ : | ||
+ | |||
+ | ==== Some questions from Lecture 5 (Berg):==== | ||
+ | * 1) Why are there 189 Characteristic Rays (see Procedure CHARAY)? | ||
+ | * 2) How realistic is Gaussian distribution for the incoming beam? | ||
+ | * 3) Difference between dispersive focus and achromatic focus. | ||
+ | * 4) On ST. GEORGE the reactions that push the energy acceptance (+/-8%) also pushes the angular acceptance (+/-40 mrad). This doesn’t seem to be true in SECAR: 15O(p, | ||
+ | * 5) Purpose of SECAR Section 3? | ||
+ | * 6) On slide 6, what is the meaning of the arrows the Effective Field Length and Good Field Regions? | ||
+ | * 7) Extended target for SECAR? | ||
+ | * 8) Engefunction (not from this Lecture)? | ||
+ | * 9) Is Q1 (Quad + Hex) used or only a design feature? | ||
+ | * 10) x_HO= (x’|x)*2_0 + HO, how are the higher order terms (HO) added | ||
+ | * 11) Clarify D in the definition of the Nominal Beam definition | ||
+ | * 12) Why is the alignment adjusted before and after the ion optical element? | ||
+ | * 13) Can the recirculatory-ring for projectile beam increase the nuclear reaction rate? I.E. can we return the projectile beam (passed through the target) to the beam again. | ||
+ | * 14) Alignment example not clear. | ||
+ | * 15) Does higher order effects give us details about the initial beam characteristic? |