Campuses:
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| imagerteleconnotes20180912 [2018/09/12 15:49] – wenxx181 | imagerteleconnotes20180912 [2018/09/12 15:58] (current) – kyoung | ||
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| * Amy: comment, removing high-v bands does not save a lot of money though | * Amy: comment, removing high-v bands does not save a lot of money though | ||
| * 2) multi-chroic | * 2) multi-chroic | ||
| - | * Roger: sinuous antenna, | + | * Roger: sinuous antenna, |
| - | * the number of bands is more restricted on the horns than antenna?? | + | * polarization rotation with sinuous antenna. This may become an issue. |
| - | * different edge tapers, is it acceptable? is it a bad idea? | + | * different edge tapers |
| - | * Shaul: none of sound like tech risks, they are systematic | + | * Experiments are fielding these pixels and both will be tested. |
| + | * In both cases could go down to 2 band pixels. | ||
| + | * Shaul: none of sound like tech risks, they are systematics | ||
| * Roger: developing reliable tech is risky | * Roger: developing reliable tech is risky | ||
| * Shaul: it isn’t clear to me what is the place to discuss this, do we discuss this in tech or systematics? | * Shaul: it isn’t clear to me what is the place to discuss this, do we discuss this in tech or systematics? | ||
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| * Shaul: agree; also points out that it will not be that we won’t have, it will be like we have those detectors, but systematics exceeds; if you have sensitivity, | * Shaul: agree; also points out that it will not be that we won’t have, it will be like we have those detectors, but systematics exceeds; if you have sensitivity, | ||
| * Amy: is there a reaslistic situation, that in 2022, not makes sense to fly 3-color? | * Amy: is there a reaslistic situation, that in 2022, not makes sense to fly 3-color? | ||
| - | * Kris: ….(Karl?) | ||
| * Shaul: we should know that we have not developed 2-color in most of our bands either | * Shaul: we should know that we have not developed 2-color in most of our bands either | ||
| * Roger: there is no concern on 2-color; there is concern on 3-color | * Roger: there is no concern on 2-color; there is concern on 3-color | ||
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| * Shaul: how serious is this issue? | * Shaul: how serious is this issue? | ||
| * Shaul: agree that readout is not a challenge | * Shaul: agree that readout is not a challenge | ||
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| + | Science descopes | ||
| + | * Amy: what to save money: shrinking the operation, scaling down requires less mechanical reduces cost; | ||
| + | * one thing that’s is simple would be to slow the spin speed, it would reduce the requirement on motor, makes it easier to point reconstruction, | ||
| + | * Kris: what is the range to reduce? | ||
| + | * Amy: now 1rpm, if half rpm, don’t know how much can save | ||
| + | * Shaul: from science point of view, the impact is on noise, more 1/f, not easy to quantify; that is something has to be assessed by simulation | ||
| + | * Shaul: all of the small scale science should be fine, the only science affected could be largest angular scale and B modes; we can simply say "the effect on the largest angular scale will be accessed" | ||
| + | * Amy: for baseline, it was 950 M, under 1B cap. Last decade, EPIC review increased 20-30%; showing some descopes is safer | ||