Changes for page FL10M3 screen system

Last modified by sndueste on 2025/01/07 15:51
From version 2.1
edited by sendels
on 2019/05/15 13:13
Change comment: There is no comment for this version
To version 8.1
edited by sndueste
on 2021/06/21 14:49
Change comment: There is no comment for this version

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Author
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1 -XWiki.sendels
1 +XWiki.sndueste
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1 1  = BL0M0 screen system =
2 2  
3 -**The BL0M0 beamblock and screen system was NEWLY installed June / July 2018 and is still under development.**
3 +**The BL0M0 beamblock and screen system was NEWLY installed June / July 2018 **
4 4  \\
5 5  
6 -\\
7 7  
8 -* BL0M0 screen system
9 -** Beam block
10 -** Screen / Ce:YAG
11 -*** Crystal
12 -*** retraction
13 -*** Beamprofile
14 -*** ROIs
15 -*** Expert Settings:
16 -** Reference Values for the camera
17 -** Details of the installation:
18 -*** Motor
19 -*** Crystal
20 -*** Iris
21 -*** Camera
22 22  
8 +{{toc/}}
9 +
23 23  \\
24 24  
25 25  Essentially the blocking of the FEL beam by the screen //and// the beam profile viewing have been separated. The beam block is operated as before "the screen" with the same buttons. To look on the beam profile a screen has to be moved in separately with the "move screen to PG / BL" buttons.
26 26  
27 27  Drawings by Svea:
28 -Beam block and Crystal are moved out:
29 -[[image:url:http://hasfweb.desy.de/pub/Setup/BL0M0/BL0M0-image.jpg||alt="BL0M0-image.jpg" width="914" height="479"]]
30 -Beam block moved in and crystal in parking position between beam paths:
31 -[[image:url:http://hasfweb.desy.de/pub/Setup/BL0M0/BL0M0-image2.jpg||alt="BL0M0-image2.jpg" width="960" height="487"]]
15 +Beam block and Crystal are moved out:
32 32  
33 -\\
17 +[[image:attach:BL0M0-image.jpg||height="250"]]
18 +\\Beam block moved in and crystal in parking position between beam paths:
34 34  
20 +[[image:attach:BL0M0-image2.jpg||height="250"]]
21 +
22 +[[BL0M0 screen system>>doc:||anchor="BL0M0 screen system"]]
23 +
35 35  == Beam block ==
36 36  
37 37  * **NOTE** the Beam block has the same functionality as the screen before. It is connected ( and can be operated via) the FLASH vacuum interlock as before. Thus if the Beamblock is **IN**, the FEL beam is blocked in the logic of the Interlock system
... ... @@ -39,7 +39,7 @@
39 39  * The Beamblock is controlled by the Vacuum SPS and moved via pneumatic
40 40  * DOOCS address: {{code language="none"}}TTF2.FEL/HASY.SCREEN/L0/{{/code}}
41 41  
42 -\\
31 +[[BL0M0 screen system>>doc:||anchor="BL0M0 screen system"]]
43 43  
44 44  == Screen / Ce:YAG ==
45 45  
... ... @@ -47,15 +47,17 @@
47 47  
48 48  * Crystal and camera are mounted together on a linear motorized stage. Thus the crystal is always in the focus of the camera, however the Camera crystal combination has to be moved to the corresponding position in the beamline . Either to BL , PG or in the parking position ( named "out") between the BL and PG position.
49 49  * the red circle in the center has 5 mm diameter
50 -* The camera is equipped with an Iris ( RASPI controlled P iris). for more details see [[here>>doc:FLASHUSER.Iris Raspi info]]
39 +* The camera is equipped with an Iris ( RASPI controlled P iris). for more details see [[here>>doc:FLASH.Iris Raspi info]]
51 51  * The Ce:YAG crystal is mounted at 45 deg to the beam and the camera, thus if the image is quadratic the beam should be round
52 52  
53 53  The panel indicated if the crystal is in or out and provides always the buttons to move the buttons to the beamline which is set by M0 ( or to be moved out):
54 54  
55 -[[image:url:http://hasfweb.desy.de/pub/Setup/BL0M0/M0_screen_is_in.jpg||alt="M0_screen_is_in.jpg" width="528" height="372"]]
44 +[[image:attach:M0_screen_is_in.jpg.png||height="250"]]
56 56  
57 57  \\
58 58  
48 +[[BL0M0 screen system>>doc:||anchor="BL0M0 screen system"]]
49 +
59 59  === retraction ===
60 60  
61 61  In order to protect the Ce YAG crystal from too much radiation, we implemented a system that retracts the crystal automatically after several minutes .
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62 62  The idea is, that the crystal can be used for tuning and looking at the beam profile but **NOT as beamblock** (which is now a separate device). In order to avoid too much moving in and out of the crystal, there is a button (in the red warning box) which resets the timer. If the button is pressed the time window starts again and the crystal stays in ...
63 63  It is to note, that before the crystal is retracted automatically it checks if the beam block is in. If this is not the case, the beam block is moved in BEFORE the crystal is retracted ...
64 64  
65 -
66 -\\[[image:url:http://hasfweb.desy.de/pub/Setup/BL0M0/BL0Mo_retraction.jpg||alt="BL0Mo_retraction.jpg" width="519" height="246"]]
67 -
56 +[[image:attach:BL0Mo_retraction.jpg||height="250"]]
68 68  \\
69 69  
59 +[[BL0M0 screen system>>doc:||anchor="BL0M0 screen system"]]
60 +
70 70  === Beamprofile ===
71 71  
72 72  There is also a beamprofile monitor available calculating the beam diameter and divergence (to be started from the upper panel button "Beamprofile") :
73 -[[image:url:http://hasfweb.desy.de/pub/Setup/BL0M0/M0_beamprofile.jpg||alt="M0_beamprofile.jpg" width="644" height="352"]]
74 74  
75 -\\
65 +[[image:attach:M0_beamprofile.jpg.png||height="250"]]
76 76  
67 +[[BL0M0 screen system>>doc:||anchor="BL0M0 screen system"]]
68 +
77 77  === ROIs ===
78 78  
79 79  Since there may be a somewhat different setting needed for the ROIs for BL and PG there is the option (in the expert settings) to set the ROIs different fror PG and BL. The move buttons also set the according ROIs ( moving to BL sets the BL ROIs...). It is also checked that the correct ROI is set when moving the screen . A warning is displayed if the ROI is not the same as in the reference values.
80 80  
81 -\\
73 +[[BL0M0 screen system>>doc:||anchor="BL0M0 screen system"]]
82 82  
83 83  \\
84 84  
85 -=== Expert Settings: ===
77 +=== Expert Settings ===
86 86  
87 -detailled settings and restarting of the servers can be done by experts on the expert tab:
79 +detailed settings and restarting of the servers can be done by experts on the expert tab:
88 88  
89 89  \\
90 90  
91 91  
92 -[[image:url:http://hasfweb.desy.de/pub/Setup/BL0M0/BL0Moexpert.jpg||alt="BL0Moexpert.jpg" width="838" height="363"]]
84 +[[image:attach:BL0M0 expert.png||height="400"]]
93 93  
94 94  \\
95 95  
96 -\\
88 +[[BL0M0 screen system>>doc:||anchor="BL0M0 screen system"]]
97 97  
98 98  == Reference Values for the camera ==
99 99  
100 100  Reference image for the camera settings
101 -[[image:url:http://hasfweb.desy.de/pub/Setup/BL0M0/M0camera_standard_settings.jpg||alt="M0camera_standard_settings.jpg" width="566" height="923"]]:
93 +[[image:attach:BL0M0 camera reference.png||height="400"]]:
102 102  The jddd panel also checks for these values otherwise an error message will be displayed
103 103  
104 -\\
96 +[[BL0M0 screen system>>doc:||anchor="BL0M0 screen system"]]
105 105  
106 -== Details of the installation: ==
98 +== Details of the installation ==
107 107  
108 108  Images of the setup::
109 -[[image:url:http://hasfweb.desy.de/pub/Setup/BL0M0/20180712_142435.jpg||alt="20180712_142435.jpg" width="432" height="268"]]
110 110  
111 -:
112 -[[image:url:http://hasfweb.desy.de/pub/Setup/BL0M0/20180712_142421.jpg||alt="20180712_142421.jpg" width="432" height="268"]]
102 +[[image:attach:20180712_142435.jpg||height="250"]]
103 +\\
113 113  
105 +[[image:attach:20180712_142421.jpg||height="250"]]
114 114  \\
115 115  
108 +[[BL0M0 screen system>>doc:||anchor="BL0M0 screen system"]]
109 +
116 116  === Motor ===
117 117  
118 118  * The motor driving camera and crystal is: mot37 at hasfmirr
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119 119  * it is connected via patch panel PPBDA M11
120 120  * [[more details in this logbook entry~[~[image:url:http://hasfweb.desy.de/pub/TWiki/TWikiDocGraphics/external-link.gif~|~|width="13" height="12"~]~]>>url:https://ttfinfo.desy.de/ExpHallelog/show.jsp?dir=/2018/27/05.07&pos=2018-07-05T16:06:25||shape="rect"]]
121 121  
122 -\\
116 +[[BL0M0 screen system>>doc:||anchor="BL0M0 screen system"]]
123 123  
124 124  === Crystal ===
125 125  
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126 126  * The Crystal is a 30 x 30 mm Ce:YAG crystal (0.2 mm thick) with a roughened Si scattering (0.6 mm thick) screen behind) mounted at 45 deg to the beam and the camera.
127 127  * Camera calibration: For x and for y we have 22 pixel per mm. Thus if the image is quadratic the beam should be round. The crystal is still not quadratic since we see the x dimension shrinked by sqrt(2).
128 128  
129 -\\
123 +[[BL0M0 screen system>>doc:||anchor="BL0M0 screen system"]]
130 130  
131 131  === Iris ===
132 132  
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134 134  * it is connected to the plug "28c-Halle-106 rechts"
135 135  * up to now there is no remote power switch installed for the Raspy ... to come
136 136  
137 -\\
131 +[[BL0M0 screen system>>doc:||anchor="BL0M0 screen system"]]
138 138  
139 139  === Camera ===
140 140  
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142 142  * The camera is mounted **upside down** thus the "rotation by 180 deg" has to be activated in the camera server
143 143  * the camera is connected via internal network to a 4 times (% class="twikiNewLink" %)PoE(%%) Switch on the gallery which is connected to hasvuvblfw1
144 144  
145 -[[BL0M0>>url:http://hasfweb.desy.de/bin/view/Setup/BL0M0||shape="rect" class="twikiCurrentTopicLink twikiLink"]] image~:
146 -[[image:url:http://hasfweb.desy.de/pub/Setup/BL0M0/BL0M0.jpg||alt="BL0M0.jpg" width="394" height="382"]]
139 +BL0M0 image~:
147 147  
141 +[[image:attach:BL0M0.jpg||height="400"]]
142 +\\
143 +
148 148  The GUI and the HELP is still under development ... in case of confusion call Stefan Düsterer 91625
145 +
146 +[[BL0M0 screen system>>doc:||anchor="BL0M0 screen system"]]