, 
 
 

• 1 machine ship to CERN - May 1999 (done)
• 3 machines ship to Spain(BCN) and USA (ANL &MSU) - August 1999

The User guide 1999    

The Module 1 Polishing (chronology, new, problems)    

The Polishing movie    

The polishing machine is equipped with a video camera   (photo ,    specifications)  connected to a monitor Philips LTC2814/50. In this way it is possible to control the polishing quality on-line, see photos:

• The new polishing machine
• view 1 of the polished fiber bundle inside the girder
• view of a polished fiber bundle inside the girder of the Module 1
• view of a polished fiber bundle with a problem then solved (Module 1)
• view of the polishing machine command box

Quantity: 4 machines, one for each instrumentation site + replacing pieces. 10 diamond tools will be ordered to Amplex (US) . 5 pieces were already ordered and will arrive at the end of August. The delivery time is 6 weeks. The price per diamond piece is 568 USD (here you find the offer). The remaining 5 will be ordered later.
 

• Polishing machine equipped with cleaning tool.
• cleaning system installed inside the girder

 
• view 1 of the diamond tool
• view 2 of the diamond tool

• The polishing machine consists of two parts: the cutting and polishing tools. At the input and output of the girder there are buffers with a cable drive system to allow the insertion and the control of the machine. The first machine has been sent to CERN at the end of March and tested there. Particular attention has been paid to the test of the air cleaning head installed on the plate of the polishing machine. Now at CERN there is the complete equipment for CB polishing work which includes the cutting tool and the polishing tool. The latter equipped with a compressed air cleaning head, a video camera for QC and the buffers with cable drive system.
• Recently some measurements have been done at YERPHI for the light transmission through the diamond-cut bundle surface, showing around 97-98% in transparency as compared to subsequently polished sample. These numbers agreed with the 95% transparency measured in 1994, when sapphire knifes were used.
• It has been evaluated that the total time consumption for the cutting and polishing operations, particularly for the CB modules, is rather high, coming partly from the closure of the access to the girder inner part, that makes difficult to perform both cutting and polishing operations within the instrumentation schedule. Taking into account the machines construction tight schedule and the transparency results we agreed with M. Nessi to construct at first the cutting tools and the tool-plates of the polishing tools, equipped with air cleaning head and video. It is proposed to make the fine polishing later, just before the drawers installation. On the other hand, it is clear that the polishing paste will not be fully cleaned out and partly will remain between the fibers if the glue filling is not good. The expected consequences are not known, so the decision on the polishing should be done later.
• Polishing machine concept, brief description and how to work with, you may find in the section Polishing details .