Differences

This shows you the differences between two versions of the page.

--- misc:epac2008 [2008/06/12 16:49]
andreasreiter
+++ misc:epac2008 [2010/02/01 21:52] (current)
@@ Line 13: / Line 13: @@
 Die Intensität bei I10 (80 MHz) stimmt zufällig genau mit dem Wert von 8E7 1/s, den David in seinem EPAC-Paper schreibt.
-Frage: Lineare oder log. Skala? Log. ist etwas besser zu sehen, nimmt aber natürlich auch einige Details weg.
+<color blue>Frage: Lineare oder log. Skala? Log. ist etwas besser zu sehen, nimmt aber natürlich auch einige Details weg.</color>
+**Ich denke linear ist besser, da sieht man den Ripple besser**
   - Spillpause Profilgitter
@@ Line 26: / Line 27: @@
 Vielleicht könnte man diese Bilder benutzen und das andere X-Profil im interessanten Bereich mit dem Spillsprung vergrößert als kleines Bild hinzufügen. </color>
+**Deine Idee finde ich gut. Vorschlag: wir nehmen eines dieser neuen Bilder und packen das Bild mit dem Sprung einfach rechts daneben, bekommst Du das hin?**
 {{epac2008_pgx_b1dg3g.png?400}}\\
 {{epac2008_pgy_b1dg3g.png?400}}\\
@@ Line 48: / Line 49: @@
 {{epac2008_th-prot.png?400}}
+**Diese Plots finde ich gut, wir sollten aber vielleicht nur die oberen nehmen, sonst finde ich es etwas unuebersichtlich, was meinst Du?**
+<color blue> Der 4-er Pack kam so zunächst aus meiner Analyse. Wir sollten uns vielleicht auf eine Ebene (SP X und FWHM X) beschränken und erwähnen, dass ähnliche Resultate für die andere Ebene. </color>
 ==== Paper: TUPC122 ====
-__Bei der Suche im Archiv wurde das Paper unter der folgenden Nummer TUPC095 gefunden?!?!__
+<color red>__Bei der Suche im Archiv wurde das Paper unter der folgenden Nummer TUPC095 gefunden?!?!__</color>
 ==== Bemerkungen Marcus ====
@@ Line 92: / Line 94: @@
 === Spill profiles by Scintillation Screen ===
+As mentioned before a central tool for the co,,isioning of the beam lines to the pqtient treqt,ent place is the isocenter diagnostics. These special kind of visual screens are mounted on the pqtient robot thqt is in treatment mode used for the exact positioning of the patient. Therfore the isocenter diagnostics is tightly bound to the coordinate system used for the medical therapy, with only a small mechanical tolerance of less than 0.3 mm (??checken) given by the tool changer. Fig 5 shows a foto of the device readily mounted on the robot arm visible in the front. Thus the isocenter diagnostics is the point zhere the matching of the beam's coordinate system as given by the beam transport system with the patients coordinate system as given by the therapy control system through the position of the robot. As a second impportant task the icd is used for beam profiling especially in the context of Verification of the beam shape for various focus settings that are employed during therapy mode. Therapy protocols are routinely carried out for automated quality assurance (see below).
+The data acqusition additionally offers automated calculation of the beam's center of mass and it's beam width with a check for possible multi-peaks as a function of eg. beam energy or focus settings. A correction algorithm for perspective and incidence angle is also included. The data can be displayed online, stored in a machine database or exported for later offline analysis.
 === Automated therapy protocols ===
+All beam diagnostic devices are an integrated part of the overall accelerator control system (ACS) of HIT. The basic principle of the ACS is to store all relevant bea, pra,eters and device settings, such as set values for magnet power supplies or the rf system, in so-called virtual accelerators (VACCs). This concept is then further enhanced for the needs of an medical accelerator by MEFI-settings, encapsulating whole sequences of VACCs with various Energy, Focus or Intensity settings as needed for patient treatment.
+Clearly procedures have to be foreseen to test and verify all beam parameters during the MEFI controlled operation of the accelerator. This is done in an automated way by means of the integrated beam diagnostic system performing so-called therapy protocols. An example for the data taken with a therapy protocol is presented in Fig 7. The plots show the center-of-mass and beam width for 4 different focus settings as a function of energy. Both parameters show a slight dependance on the beam energy, that has to be further minimized by tuning the machine. It is important to mention that the profile data of MWPCs, Scintillation Screens and Isocenter Diagnostics can be included into therapy protocolls in an identical manner.
 === Conclusions and outlook ===
+We have presented that the well-integrated beam diagnostic devices of HIT include essential tools for the whole commissioning process. Especially the beam diagnostic devices of the HEBT section are used for troubleshooting and fine-tuning of the HIT synchrotron, as well as tests and verification of the beam delivered to the treatment places. In order to verify the beam as needed for medical treatments the isocenter diagnostics has proven to be extremely useful. For an effective and time-optimized commissioning of this final part of the accelerator automated therapy protocols were implemented. These procedures will in the future be also part of routine checks when the HIT facility is in operation for patient treatment.
 === References ===
@@ Line 101: / Line 111: @@
 REF1: Ueberblickspaper HIT, zB Eick EPAC2004
 REF2: HICAT-BD, SCHWICK EPAC2004
-REF3: DIPAC2007 ??
+REF3: DIPAC2007 ??\\
+<color blue>
+Paper Tobi Spillstruktur!\\
+EPAC Beitrag David Ondreka (TUOCG01): The Heidelberg Ion therapy (HIT) Accelerator Coming into Operation\\
+EPAC Beitrag Udo Weinrich  (TUPP133): Assembly of the Carbon Beam Gantry at the Heidelberg Ion Therapy (HIT Accelerator\\
+EPAC Beitrag Udo Weinrich  (TUPP134): Commissioning of the Carbon Beam Gantry at the .........Accelerator \\
+</color>

GSI - BEA Wiki

User Tools

Site Tools

Differences

Page Tools