AMiBA Engineering Telecon Minutes
25, Oct. 2001


Chair: K.Y. Lo
Participants: B. Martin, J. Peterson (USA)
M. Sinclair, M. Kesteven, W. Wilson (ATNF)
H. Wang, T.D. Chiueh, M.T. Chen, Y.J. Hwang, R. Hu, H.M. Jiang, W. Ho, C.J. Ma, K. Lin, P. Shaw (Taipei)

 

Summary

Correlator:
 Jeff has spent two days in LA to test two mixers array and power divider itself, both of them are promising, they don't have time to test the delay line section. He thinks no problem to get all components work, but the critical point is to get all pieces work together as required. Within two weeks time, they will finish the complete unit, and send it to Jeff to do the thorough test. If it works, we need to order 4 more units for cross polarization experiments.
Some options if it's not work:
1. frequency split system like CBI uses;
2. Warwick's narrow band width lag correlator after frequency splitting, but that will be a real big job. We need to discuss further more after we got a definite sense about the whole thing works or not by mid-Nov.
As to the read-out chip, Warwick will add an external analogue de-modulator to Prof. Chiueh's chip. And this chip will not do the de-modulation, but only doing the data acquisition. So we may don't to use the discrete version. Meanwhile, Prof. Chiueh will revise chip design according the test result at AT, and have a wafer run at CIC in Dec.

Receiver:
 Receiver team is working very hard on the receiver chamber and OMT, they had some technical problem, but all get resolved now.

SiGi:
 Warwick has signed a dis-closure agreement and sent back to the company in Germany, he haven't gotten the module from them. He hopes to get some chips back early next year.

Protorype mount:
 Philippe made a new model, that's much lighter than before, weight is about 180kg. He will do further analysis on the platform in another angle as well. He will fax the new model as well as the analysis data to Mike to review

 


Action items

  1. Bob/   Bob will keep in touch with Russ Schnell of MLO to find out the management's decision. Meanwhile, we need to think about an alternate if Mauna Loa falls through.
  2. Bob/   Huei Bob and Huei will look into the UMss contract, and compare the difference with RCU contract. Offline discussion in details will be followed up shortly.
  3. Bob/Mike/Jeff   Bob will set up a phone meeting with Mike and Jeff to figure out a solution to measure the dishes on platform at site.
  4. Jeff/ Bob   Jeff will find out the dish supplier for CBI. Bob will get the price of 60cm dishes from CMA.
  5. Jeff/   Jeff will provide a layout drawing of the 16 elements correlator to Warwick, so that Warwick could figure out how to put the read out chips and the correlator together
  6. Mingtang/   Mingtang will talk to Leo and Prof. Chu to figure out the status of IF and LO.
  7. Bob/Mintang   Bob and Mingtang will discuss offline about the OMT/Photonic LO issues today later.
  8. Fred/Warwick   Fred will call Warwick this afternoon to discuss some of collaboration issue related


Next meeting date/time: Thursday, 1, Nov. at 8:30AM Taipei time