VIRMOS Mask Manufacturing Unit executive summary Back to MMU home | Reload this page

Executive summary

MMU configuration

A block diagram of the final MMU configuration after PAC (i.e. not including the parts required for NIRMOS) is given below. The characteristics of the main components are recalled here (for info on individual items to appear in the bottom frame click on the diagram). Pictures of the various components can be seen in the Milan and Paranal arrangements.

[interactive block diagram]

CutManager and MHS were developed at IFCTR. The third piece of s/w developed at IFCTR is a mirroring s/w which keeps a backup of the data areas on MMCU and MHCU to facilitate recovery in case of disk failures.

The following table gives a visual impression of the GUI of CutManager and MHS. The various panels are listed according to a "typical" sequence. Put the mouse on one of the thumbnail images to read a description in the bottom frame, click to view a full size enlargement.
[GIF: GUI start form] [GIF: order form] [GIF: convert form] [GIF: CCam GUI] [GIF: Cut Manager GUI] [GIF: StencilMaster GUI]
[GIF: store form] [GIF: unload form] [GIF: load form] [GIF: discard form] [GIF: recovery form] [GIF: view log form]

MMU principles of operation

The entire MMU system allows to perform the following operations necessary for execution of VIMOS and NIRMOS observations : In addition it is possible to manually cut masks for FORS2 observations.

All operations (but contingency recovery which is autonomous) are initiated after receipt of an order from an "higher" ESO/instrument subsystem, and terminate making available a termination report to the same subsystem. In addition such subsystem has access to the tables describing the current content of the SC (SCT) and ICs (ICT).

The following diagrams show the complete data flow (simplified for what is upstreams of the MHS, i.e. outside of the MMU) inclusive of files exchanged and masks produced or moved in/out SC and ICs for the three operation cycles :