Using the Rack Wizard

Introduction: new Run 2 tool

For Run 2 the original Rack Wizard as described below was completely rewritten.

It can now be launched from the ATLAS Technical Coordination Applications page.

Documentation is available through the rack wizard menu page.

The rest of this page is obsolete but kept for lists of power consumption etc.

Introduction: old Run 1 tool

The layout of racks in ATLAS (and other LHC experiments) is configured using the Rack Wizard tool (developed by Frank Glege from CMS). In the next sections are some instructions for looking at the rack layout and some background information on the numbers I put in for crate power dissipation etc.

Instructions

• go to https://oraweb.cern.ch/pls/atlasintegration/docs/EMDH.html
• this will download and automatically run a java application (separate program, not in your browser window). You will have to say OK to the security warnings. Next time you can just double click the downloaded program and dont need to visit the URL again.
• after a few seconds the program will invite you to login: just click the "Read only" button. NB if you click the (empty) browser window before the program starts you may hide the login window.
• after a few seconds you should get a big new window. Down the left side is a tree. Click on the little triangle by "USA15 level 2". NB I advise against clicking the "USA15 level 2" text initially, it keeps redrawing the screen for each rack it gets from the database.
• after opening up "USA15 level 2", you will see a list of racks by name. But _now_ you can click on the "USA15 level 2" text to get the graphical view of USA15 racks without all the update flicker.
• scroll down to the bottom (which is the front, nearest the detector) and double click a rack to show the layout. The toolbar has an "up" button to return to the graphical view.
• single click on objects inside a rack to show more details, eg what I have put in for power dissipation (crates) or power supplied (power supplies).
• the racks and crates are coloured according to their power dissipation. Racks may be green (≤0kW), cyan (0-4kW), yellow (4-6kW), orange (6-8kW) or red(>8kW). Crates (or other rack elements) may be cyan (<0kW), green (0kW), or red (>0kW).

Power Dissipation

The information I have about power supplies is as follows.

• Receiver crates: 2 * 100A @ +5V + 100A @ -5V = 1.5kW
  3U air cooled power supply in the rack
• Preprocessor crates: 300A @ +5V + 300A @ +3.3V + 40A @ +12V + 40A @ -12V = 3.5kW
  6U air cooled power supply in the rack
• CP/JEP crates: 300A @ +5V + 200A @ +3.3V = 2.2kW
  water cooled power supply in the back door
• ROD crates: 300A @ +5V + 200A @ +3.3V + 24A @ +48V = 2.9kW
  water cooled power supply in the back door
• 6U VME crates: typically 1kW
  air cooled power supply behind the crate?

The totals per rack are as below. Note that each rack is supplied with 10kW as standard. These figures do not include power dissipation in the supplies themselves. Not sure how much this is but if its 50% of the supplied power the PP racks may go over the limit.

• Receiver racks: 3.0kW
• Preprocessor racks: 7.0kW
• CP/JEP racks: 5.4kW (two 9U + 1 6U crate)
• ROD rack: 6.8kW (two 9U + 1 6U crate)

Editing Rack Information

This section contains some notes in editing the rack information. This requires you to login to the rack wizard with a username and password instead of "Read only". These are really reminders to myself.

• there are some (slightly outdated) instructions. NB ignore the stuff about "copy" and "move" modes.
• copying a rack: configure one rack, select another, delete all the items, then drag the first rack to the second one and click OK. If its too far to drag, copy the rack to the clipboard.
• editing a rack: drag unwanted items out. Drag new items into position from the template box. Some parameters can be changed when the new item is in position.
• creating a new template: drag an existing template into some free space in the template box and enter new values into the popup window.