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--- questions_area [2018/09/11 13:41]
schatz
+++ questions_area [2018/09/24 13:01]
berg
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   * R11, R12, R21, R22 - can more than one be zero?
 {{:questions_answers.pdf |Answers}}
+==== 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, charge state population?
+  * 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/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? Setup of multi-slit for angle calibration, drift between target and multi-slit.
+  * 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?
+{{ :questions_answers_lecture2.pdf |Answers}}
+==== 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?
+{{ :questions_answers_lecture3.pdf |Answers}}
+==== 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,g)19Ne pushes the energy acceptance (+/-3.1%) but not in the angular acceptance (only +/-15.6 mradvs. SECAR’s +/-25 mrad acceptance). Is there a reason SECAR was designed with angular acceptance so much larger than the energy acceptance?
+  * 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? Or do HO effects tell us that the beam line is different than what we think? ( e.g. field imperfections in the magnets etc.)
+{{ :questions_answers_lecture4.pdf |}}

JINA-CEE ION OPTICS SUMMER SCHOOL: JIOSS 2018

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