Differences

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

--- technical:mtr2 [2026/06/30 09:46] – [MTR2 spectral resolution] etienne
+++ technical:mtr2 [2026/09/28 15:41] (current) – [Schematics of MTR2] saida
@@ Line 12: / Line 12: @@
 The following table present typical values of the MTR2 spectral resolution, δλ, for different wavelength and F2 entrance slit width.
-^  MTR2        ^  Wavelength  ^^^^^
+|              |              ^  Wavelength  ^^^^^
-^  entrance    ^  4861.3 Å  ^  5250.0 Å        ^  5875.7 Å  ^  6302.0 Å        ^  6562.8 Å  ^
+|  :::         |  :::         ^    Hβ      ^  Fe I doublet  ^   He I D3  ^  Fe I doublet  ^  Hα        ^
-^  slit width  ^  (Hβ)      ^  (Fe I doublet)  ^  (He I D3) ^  (Fe I doublet)  ^  (Hα)      ^
+|  :::         |  :::         ^  4861.3 Å  ^  5250.0 Å      ^  5875.7 Å  ^  6302.0 Å      ^  6562.8 Å  ^
-|  0.5"        |  19 mÅ     |  23 mÅ           |  28 mÅ     |   26 mÅ          |  31 mÅ     |
+^  MTR2        ^  0.5"        |  19 mÅ     |  23 mÅ         |  28 mÅ     |   26 mÅ        |  31 mÅ     |
-|  0.3"        |  12 mÅ     |  14 mÅ           |  17 mÅ     |   17 mÅ          |  20 mÅ     |
+^  entrance    ^  0.3"        |  12 mÅ     |  14 mÅ         |  17 mÅ     |   17 mÅ        |  20 mÅ     |
-|  0.1"        |   6 mÅ     |   7 mÅ           |   9 mÅ     |    9 mÅ          |  10 mÅ     |
+^  slit width  ^  0.1"        |   6 mÅ     |   7 mÅ         |   9 mÅ     |    9 mÅ        |  10 mÅ     |
@@ Line 32: / Line 32: @@
 The moving parts are:
   * The predisperser gratings selection table (EM35). There are 3 selectable predispersers, although only one (the central slot) is mainly used for MTR2 operation.
-  * PThe predisperser rotates about the Y axis to change its grating incidence angle (EM37). This allows shifting  the lowres spectrum along Z over the masks stop plate.
+  * The predisperser rotates about the Y axis to change its grating incidence angle (EM37). This allows shifting  the lowres spectrum along Z over the masks stop plate.
   * The mask plate translates in the  Z direction (EM39)
   *  The echelle grating rotates about the Y axis to change its grating incidence angle a (EM32). This allows shifting the highres spectrum along Z at the SP2 output.