Dear Morag,
At CHIME <https://chime-experiment.ca/en>, we have used Roach1 with a
two-dish system as a proof of concept back in 2010. Then later, we
developed our own customized F-engine hardware with the same FPGA and
ADC chips as Roach1. We use CASPER ADC/FFT/PFB blocks into an
AXI-Streaming interface wrapper, which is the standard used for our
signal processing pipeline. We inherit core concepts of the signal
processing chain implemented in the CASPER spectrometer, mainly the
notion of 4b/4b re/imag output going to the X-engine.
The current CHIME F-engine provides additional functionality, uses
different packet assembly and shuffle code, and offers a multi-board
synchronization scheme in order to scale up to 2048 channels, all of
which, is designed and developed outside of the CASPER framework.
The FFT is a critical element in the quality of the science data and in
addition to being fast and resource-efficient, we know that we can trust
it for it has been vetted by the community.
Mandana for the CHIME team
On 9/3/2022 1:25 AM, 'Jonathan Weintroub' via [email protected]
wrote:
[*CAUTION:* Non-UBC Email]
Ciao Morag,
It is not a full CASPER instrument, so maybe a marginal case: the ALMA
Phasing System
<https://iopscience.iop.org/article/10.1088/1538-3873/aa9c3d/pdf> (APS)
is a retrofit of a VLBI beam forming capability to the non-VLBI
capable ALMA Correlator,
<https://www.aanda.org/articles/aa/pdf/2007/05/aa4519-05.pdf> which
was designed a non CASPER proprietary ASIC-FPGA instrument. The APS
used CASPER ROACH2 boards (and non-CASPER flow HDL firmware) as the
hardware platform for the “Phasing Interface Cards” or PICs, of which
there are eight in the system. The PICs are shown in figure 2 and
also in figure 7 of the first linked reference.
While it’s not a holistically CASPER instrument, the APS is a very
significant facility instrument at a very important radio telescope.
I’d be interested to hear whether CASPERites feel it warrants
inclusion in your list, and how it should be described.
Best wishes,
Jonathan
On Aug 31, 2022, at 12:53 PM, Morag Brown <[email protected]> wrote:
Ciao dalla Sardegna, collaborati!
I'm hoping to put together a more up-to-date list of instruments that
have been built using CASPER hardware and tools. The most current
list was compiled in 2016 for the "A Decade of Developing
Radio-Astronomy Instrumentation using CASPER Open-Source Technology"
paper by Jack et al, so it could probably use updating.
The list is currently as follows:
*Spectrometers and packetizers -*
Fly’s Eye
GUPPY
CASPER
BPSR
GAVRT
SERENDIP V.v
HiTREKS
NUPPI
Skynet
RATTY
cycSpec
C-BASS
HIPSTER
KuPol
VEGAS
ALMA Phasing Project
Leuschner
R2DBE
DSN Transient Observatory
VGOS
AVN-Ghana
COMAP
*MKID readout systems -*
Columbia MKID
Mustang2
DARKNESS
MEC
BLAST-TNG
HOLMES
*
*
*Correlators and beamformers -*
KAT7
PAPER
ATA
LEDA
ARI
MAD
pocketcorr
Medicina FFTT
GMRT
Meteor
AMI
MeerKAT AR-1
FLAG
BIRALES
Starburst
AMiBA
EOVSA
SWARM
MeerKAT
HERA
If you are not (or know of any instruments that are not) on this
list, please reach out to me for it to be added?
Grazie!
Morag
--
You received this message because you are subscribed to the Google
Groups "[email protected]" group.
To unsubscribe from this group and stop receiving emails from it,
send an email to [email protected].
To view this discussion on the web visit
https://groups.google.com/a/lists.berkeley.edu/d/msgid/casper/CAGH-0TcON2s8K2JqXe0OAWWMeUeuKrnGSzhfRJS%2BWym%2BZiiE_A%40mail.gmail.com
<https://www.google.com/url?q=https://groups.google.com/a/lists.berkeley.edu/d/msgid/casper/CAGH-0TcON2s8K2JqXe0OAWWMeUeuKrnGSzhfRJS%252BWym%252BZiiE_A%2540mail.gmail.com?utm_medium%3Demail%26utm_source%3Dfooter&source=gmail-imap&ust=1662547996000000&usg=AOvVaw3c06Y03UGNP25sWPeQhWqj>.
--
You received this message because you are subscribed to the Google
Groups "[email protected]" group.
To unsubscribe from this group and stop receiving emails from it, send
an email to [email protected].
To view this discussion on the web visit
https://groups.google.com/a/lists.berkeley.edu/d/msgid/casper/3D804AB2-5ACD-448C-B3DB-F381D3551BE8%40cfa.harvard.edu
<https://groups.google.com/a/lists.berkeley.edu/d/msgid/casper/3D804AB2-5ACD-448C-B3DB-F381D3551BE8%40cfa.harvard.edu?utm_medium=email&utm_source=footer>.
--
Mandana Amiri
Department of Physics & Astronomy
University of British Columbia
204-Hennings, 6224 Agricultural Rd.
Vancouver, BC V6T 1Z1, Canada
+1 778 788 4431
skype id: mandana.amiri2
--
You received this message because you are subscribed to the Google Groups
"[email protected]" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
To view this discussion on the web visit
https://groups.google.com/a/lists.berkeley.edu/d/msgid/casper/276bf2e4-c9b3-fe11-a53e-62ed4c838828%40phas.ubc.ca.
