S4 — Ioncatcher Degrader System

FRS Home Page - – S4 – Pictures – Drawings – Cable Connections

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Updated May 6th, 2022.

 

The ioncatcher degrader consists of:

• two ladders (GHFSEM1GL from below and GHFSEM1GR from top) for fixed plates,
• a double wedge vor variable thickness (GHFSED4 from below and GHFSED5 from top)
• two wedge shaped disks for variable angle (drive in / out = GTS3ED7DP), rotation still on extra controller .

Sorry, the two wedge-shaped plates and the two wedge-shaped disks are not yet integrated into the online calculator, use this excel: (2025 version: calc_Drehdegrader-2025.xlsx).

The key parts are:

On ladders:
2018 wedge-shaped plates from Hallstein&Heyl (AlMg3 rho = 2670 mg/cm³):

• 2 to 8 mm Al wedge   "Keil-2": slope = 0.01691, deviaton from plane sigma_z = 30 um
• 2 to 18 mm Al wedge "Keil-2": slope = 0.01750, deviation from plane sigma_z = 6.2 um
• 1.5 mm Ta plate
• 3.0 mm Ta plate

Double wedge:
2012 ion catcher degrader plates:

• plate 1 (from Kugler): slope = 39.94 mg/cm³, central thickness= 1164 mg/cm²
• plate 2 (from Kugler): slope = 40.02 mg/cm³, central thickness= 1158 mg/cm²

Wedge-shaped disks:
2012 ion catcher degrader disks:

• disk 1 (new from ESS): slope = 24.62 mg/cm³, center thickness= 482.2 mg/cm²
• disk 2 ( from Kugler): slope = 24.68 mg/cm³, center thickness= 510.0 mg/cm²

 

Picture of Hallstein&Heyl plate from 2018 with dimensions:

 

Picture of S4 degrader drives from 2012:

 

Picture of S4 degrader ladders mounted in beam Nov 2019:  

 

Picture of disk controller Nov 2019 in front of gate to S4:

 

How to use:

1. Switch on (on back side)
2. starts in standby, press button [standby] (wait ~ 1min)
3. select [Home] in menue on screen
4. select axis-number = 0
5. select "absolut" motion
6. enter new value with number keys and press [valid]
7. press [exec]

 

Degrader Calculator

 

Ion Catcher Degrader Calculators

Wedge Plate Degrader Thickness Calculator

Position of HFSED4 (mm):

Position of HFSED5 (mm):

Calculate Thickness

Wedge Disk Degrader Slope Calculator

Enter Slope (mrad):

Calculate

~ Debodyuti Kar

IonCatcher_Degrader_Calculator